WARNING: The following contains spoilers for Champions #1 by Jim Zub and Steven Cummings, currently available online and in stores.
If there are three words that can drive fear into the heart of any Spider-Fan, they're "one more day." Following the chaotic fallout of Civil War, Spider-Man ultimately made a deal with the Marvel devil himself, Mephisto, to rewrite reality in the "One More Day" arc. This led directly to the "Brand New Day" era of stories, as well as some long-standing displeasure from the fan community. While the last year has seen many of that story's repercussions reversed, it seems that a similar threat might be coming for another Spider-Man.
In the pages of Champions #1, it looks like Miles Morales has made some kind of bargain with Mephisto, and it may concern the fate of an entire generation of new Marvel heroes.
Deal With The Devil
Mephisto, created by Stan Lee and John Buscema for Silver Surfer #3, has long been one of the most malevolent forces in the Marvel Universe. For example, he served as the (literal) devil whispering into Thanos' ear during the events of the Infinity Gauntlet story. He's a big deal, is what we're getting at.
But perhaps his most infamous moment came during "One More Day." The final story of J. Michael Straczynski's run on Amazing Spider-Man, the story essentially rebooted Peter Parker and his entire life. After having his identity revealed to the world, Aunt May was mortally wounded. Left with the choice to let her die with the knowledge that she was at peace or make a deal with the devil, Spider-Man went with the devil. His identity was made secret again, Aunt May was saved and Mary-Jane Watson (who at the time was married to Peter) was written out of the books as a side effect.
The "Brand New Day" era of stories led to a number of modern Marvel classics, and even the entire Dan Slott run on the title, but it wasn't exactly a popular decision. The comic was reviled as one of the worst Spider-Man stories of all time. It fundamentally shifted Spider-Man for years, and it's only been recently that some of the longer lasting changes brought on by the status quo shift (like the absence of Mary-Jane) has been reversed. Even for those who enjoy the new stories, having Peter essentially sell his marriage to Mephisto was seen by many as an out-of-character deal-breaker.