I'm super excited for brand-new heroes, but I was thinking about how you could broaden existing characters. It'd be really cool if they came out with a Spider-Man expansion or Iron Man expansion that was just 3-5 new Alter Ego/Hero Cards + Hero Decks. Maybe Hero cards more specifically geared towards specific aspects with new abilities and stats, rather than a simple alternate art of the existing cards, and a Hero Deck to coincide. It'd be a neat way to easily generate lots of new iterations of popular characters without dedicating multiple traditional expansions to them.
NOTE: I'm also addressing the Alter-Ego because you could totally have a new Spider-Man and it be Miles Morales, Ben Reilly, Miguel O'Hara, or whoever. It'd be neat to get variants for Peter Parker/Spider-Man, or Steve Rogers/Cap (hopefully we see a Sam Wilson/Cap!), etc.
Edited by yalestewart