This fall, Marvel Comics is all about legacy. At Comic-Con International in San Diego, Marvel Comics leadership and talent -- including editor-in-chief Axel Alonso, editors Nick Lowe and Sana Amanat and creators Rodney Barnes, Cullen Bunn, Joshua Cassara, Donny Cates, Geoff Shaw and Margaret Stohl -- were on hand to discuss what's next for Earth's Mightiest Heroes, what's in store with Marvel's upcoming Generations line of comics and more.

"Generations is a 10-issue maxiseries that sort of sets the next chapter of the Marvel Universe," Alonso explained. Referencing the Vanishing Point, he said, "We got to thinking what if we took some of our characters and sent them to the same place that Steve Rogers went."

"This is putting her face-to-face with the iconic Jean Grey right when she had the Phoenix Force," Bunn said of his title Generations: Phoenix.

"I get to reteam Carol with Mar-Vell," Stohl shared, referring to her book Generations: The Bravest. "If any of you know me, you know my motto for girl heroes everywhere is 'Girls Are Amazing.' No sidekicks; just butt kicks. That's what we get to Mar-Vell, and he gets to see her... it's a lot of fun. It's a lot of action."

Amanat also discussed the upcoming team up between Carol Danvers' Ms. Marvel and Kamala Kahn's Ms. Marvel. "I'm really excited about this particular issue because Ms. Marvel teams up with classic Carol Danvers in her classic costume," she said. "Kamala shows up and knows exactly what she needs to do: 'I need to blend in'... it's really a story about Carol Danvers and Kamala Kahn... this going to be the beginning of the healing process. Willow being Willow, it's endearing and funny."

Alonso then brought the topic to Marvel Legacy. "Over the next several months, we're going to be bringing back several of your favorite characters and artifacts back to the Marvel Universe," he explained. "Across the line, all of our writers and artists have put together stories longtime fans will love."

"In this story, Mojo is coming to the Marvel Universe. He has big terrible plans," Bunn said of an upcoming crossover between X-Men Gold and X-Men Blue. "He's going to draw both the X-Men Blue team and the X-Men Gold team into it. And Longshot's back... You're going to see Rachel in her hound suit."

This fall, Jean Grey: Psych Wars will pit young Jean Grey against Emma Frost for the first time since Inhumans vs. X-Men.

Captain Marvel: Dark Origins will find Carol Danvers in a universe that is the dark inverse of the main Marvel Universe.

America: Exterminatrix from Gabby Ribera and Joe Quinones will bring Extermanatrix back to the Marvel Universe.

Falcon: Take Flight by Rodney Barnes and Joshua Cassara will put Sam Wilson in a new uniform as he deals with the fallout of Secret Empire.

Doctor Strange: Sorcerer Supreme No More from Donny Cates and Gabriel Hernandez Walta makes Loki the new Sorcerer Supreme. "It is the story about the lengths Stephen [Strange] will go to make things right in his life," Cates explained.

Donny Cates will team up with Geoff Shaw on a new series: Thanos. "I keep coming up with ideas that are just so darkly brutal," Cates said. "I just understand him as a character and as a god. I just keep pushing and pushing and pushing... I don't want to get too much into what I'm doing, but the basic idea is that... I believe every Marvel hero in the galaxy, if you were to catch them on a dark day and asked them how the world was going to end, they'd say, 'Thanos, of course.' He's just always there."

"I'm just excited. I get to draw everything. It's just so big and out there," Shaw added. "Not to belabor the point, but Donny told me the pitch too, and I was like, 'Really?' It's out there, it's crazy, it's huge."

In Moon Girl and Devil Dinosaur, Lunella and Devil will get some new teammates. "She will be teaming up with Ben Grimm and Johnny Storm," Amanat revealed.

G. Willow Wilson and Marco Failla's Ms. Marvel will find Kamala dealing with the fact that New Jersey hasn't been happy with her; in fact, she has "made enemies of the beloved city she's trying to protect," according to Amanat. A new villain will also feature in the series this fall. "It's going to force her to grow up," she said. "It's Willow doing what she does best."

Lowe also announced The Immortal Iron Fists by Kaare Andrews and Afu Chan. The title is a six-issue biweekly series that is now on sale on comiXology. It will feature a new character, a little girl from K'un L'un. "She's training to becoming an Iron Fist," Alonso revealed. "It's not easy. The question is: can she become the Iron Fist?"

X-Men: Grand Design by Ed Piskor will arrive in comic book stores this December. This will be a six-issue series that will feature one decade of X-Men history per issue, starting in the 60s and moving through the Claremont era to modern day. Each issue will feature a decade's worth of stories.

"The entire point of Generations is to understand what that title means," Amanat explained. "How do Carol Danvers and Kamala Kahn embody that in different ways? It's about their chemistry. This story is sort of about Carol getting something from Kamala. It does affect future relationships of these characters.

Asked if Generations will deal with the Golden Age of Marvel characters at all, Lowe said, "We don't have any plans for that right now with these Generations books."

"Black Widow... there's stuff coming up. I don't think you'll hear about it at this convention, but we have a lot coming up," Lowe teased.