For years, DC Comics marketed their big three stars as Batman, Superman, and Wonder Woman. More recently, Harley Quinn has been added to the mix as a centerpiece of the DC brand, but really, there are not any more iconic superpowered stars than Kal-El of Krypton and Diana of Themyscira.

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The two have had a long shared friendship together, and on occasions, they have been more than just friends. Of course, there are so many changes to continuity, it can be hard to keep track of everything these two are to one another. These are ten questions about their relationship that need answers:

10 What is their post-Rebirth continuity like?

This is the question that a lot of the others are built upon. In 2016, DC Comics relaunched itself (again) under the new Rebirth imprint, as it was revealed that The Watchmen's Doctor Manhattan had been messing with the continuity of the DC Universe.

While major events that took center stage included the return of Wally West and Batman finding the Comedian's classic smiley face pin hidden in the Batcave, there were many major changes to both Superman and Wonder Woman's continuity as well. So the question is just what are they to one another in this new continuity?

9 Do they remember The New 52 relationship?

Rebirth was just the newest in a series of soft and hard continuity reboots that DC Comics underwent in a five year period, beginning with the events of The New 52--a company-wide relaunch of all its titles. Without getting into all the details, there was a lot of good and a lot of bad in The New 52.

One major element that was polarizing among fans was the new romantic relationship between Superman and Wonder Woman. Rather than Superman being with Lois Lane and Diana being with Steve Trevor, the two superheroes became DC's newest power couple. This version of Superman split up with Wonder Woman and then died toward the end of The New 52, which begs the question,  how much of this relationship is even remembered on any level by either character?

8 What did the events of Greg Rucka's Wonder Woman run do to them?

Wonder Woman's introduction in The New 52 completely changed the character to the point of barely being recognizable to some long-time fans. To address this in DC: Rebirth, her story was reinvented yet again by writer Greg Rucka (who had previously worked on the character in the mid-2000s). Rucka's story began with the revelation that the world as Diana understood it was an elaborate illusion meant to fool her, thus forcing her to shatter the illusion in order to find the truth.

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Part of Diana confronting this deception was to go back and re-examine her origin (where readers got to see her life on Themyscira, in which she was involved in polyamorous same-sex relationships). Considering how much of her understanding of life was based on a lie, one has to wonder just whether the relationship with Superman was part of this deception.

7 What did the events of Superman: Reborn do to them?

If Wonder Woman's story in Rebirth seems convoluted, it is positively simple compared to Superman's. At the start of DC: Rebirth, the Superman of this era comes out of hiding, where he has been with his son Jon and his wife Lois Lane. He is actually the Superman of the pre-New 52 DC Universe who has crossed over into this reality. Meanwhile, the Superman of The New 52 has been killed, meaning this pre-New 52 version of the character is the only official Superman.

Eventually, it's revealed that someone has been messing with the Kryptonian's timeline, and that the two separate versions of the character--the original and his New 52 counterpart--are really the same individual whose personal timeline has been tampered with. These two are then fused back together into a single entityWhat does this fusion mean for the chronology of events involving his and Wonder Woman's relationship?

6 Is romantic non-monogamy an option?

Non-monogamy (also called polyamory) is a relationship between more than two partners, which can take different forms. While both Clark Kent and Diana of Themyscira currently live in the United States where most mainstream relationships are monogamous, there is no reason to think that two superhumans from other worlds can't have super romantic commitments to multiple partners.

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Clark is married to Lois Lane. When Superman's identity was still a secret, Lois was accused of cheating on her husband Clark Kent after a picture of Lois kissing Superman was made public. Lois clearly didn't care, being both open-minded and pragmatic. Meanwhile, Diana's definitely polyamorous, something her primary partner Steve Trevor has no problem with. Would a polyamorous romance work for them?

5 What are relationships like on Krypton?

Not a lot about Krypton is known since Superman's home planet exploded when he was still an infant. There have been glimpses of it, and he has certainly studied records of its past, but beyond his accounts and whatever his teenage cousin Kara gleaned in youth, there is not a lot that is known about the planet.

Thus emerge a whole bunch of new questions to mull over. What were Kryptonian relationships like? Were they monogamous nuclear families? Were family structures more like communal extended tribal networks? Was romance part of domesticity and child-rearing among parents? How many genders and biological sexes were recognized among Kryptonians? And how much of this, if any, influences Kal-El's relationship outlooks, given his traditional Kansas upbringing?

4 How do Lois and Diana feel about one another?

As Clark Kent's wife, Lois Lane is hardly playing second fiddle to the man of steel. Her father, a leader in US intelligence and security forces, taught her everything she needed to take care of herself, while she independently forged a career as a Pulitzer-winning journalist.

Lois isn't intimidated by life with the most powerful man on the planet, but how does she feel about her husband's closeness with the world's most powerful woman? And how does Wonder Woman feel about a strong woman with no powers who commands so much respect?

3 How does Clark feel about Steve Trevor?

Superman can hear what people whisper when they're alone in a room with nothing but their most intimate thoughts. He is Orwellian surveillance personified.

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Meanwhile, Steve Trevor is a human who has gotten his hands dirty while fighting for his country. He's a good man who has worked with heroes, but has also inevitably done things which are not heroic, as is implied by his ties to Amanda Waller and his black ops training. Superman knows Trevor's secrets. What does the Man of Tomorrow think about the man who Diana spends nights with? And how does Steve Trevor feel about an alien from another world being so close to Diana?

2 Will they be a romantic couple in the future?

There are multiple future timelines in which Wonder Woman and Superman become a couple, the most famous probably being Mark Waid and Alex Ross's epic comic Kingdom Come.

The future is uncertain, especially amid the constant continuity changes of comics, but one has to wonder what the future has in store for DC's two most powerful heroes. Fans will ultimately be left wondering the answer and will have to choose for themselves which hypothetical future is most likely, but considering that both Kal-El and Diana are likely to outlive their human partners, one has to wonder if they will end up together.

1 Will they have kids in the future?

Superman has a son, Jon Kent. This shows that Kryptonians are biologically capable of having children with humans. Wonder Woman is much more than a mere mortal, but she could possibly conceive a child with the Man of Steel, something also indicated in the comic Kingdom Come.

Assuming their relationship ever is definitively established as more than just friends, would the two want to have a child together? And what would this mean for these two, their primary partners, and Superman's relationship with his son Jon?

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