Well,which are the characters would you like to see in 2017?
Avengers
Wasp- She is as a team-up,but it could be great having her in game as playable.Plus,tons of costumes and the possibility of a Yellowjacket enhanced.
Hercules- Hercules could be played as your typical brick/melee character,but his personality could make him a fun character.
Wonder Man-A classic Avenger.He is a brick but his ionic energy nature could make him an energy melee/range character.
Hank Pym- I know it's difficult to have a standalone Pym character,considering his variety of codenames and powers,but one can hope.
X-men
Bishop-One of my favorite X-man.His ability to absorb energy and re-direct it could be an interesting mechanism in game.In my mind,he could have a tree with guns like Cable,but his energy absorb powers could need him to accept some damage in order to fill his spirit.Tons of interesting possibilities.
Professor X- Could be a great mental dmg character,but which version could be used?The one in the wheelchair or the one that walks with his back fixed.
Havok-Could be nice to see him.Range/energy damage.Fun stuff.
Spider-Man
Doc Ock- We have 2 of Spidey's arch-enemies playable,so why not finishing the trio of Spider-Man's greatest foes.Dr Octopus could work similar to Mr Fantastic with his range/melee attacks and his past as Sinister Six's founder and leader could allow him a summoner skill similar to Luke Cage/Cyclops/Thing.
Sandman-The most easy to use as hero,considering his reformed past and probably the most versatile and fun of Spidey's rogues.His powers could be fun and put Venom to shame.
Thunderbolts
Songbird- The heart and soul of the team.A classic member of Thunderbolts and an Avenger recently.If one of the original roster should be in game,it's her.
Moodstone- She could be an enhanced for Ms Marvel.
Baron Zemo-The founder of the team.The evolution of Zemo from a petty criminal with daddy issues to a complex anti-hero,makes Helmut Zemo an interesting character.He could work as a dark Captain America,with a combo of Cap/Taskmaster skills.
Fantastic Four
Crystal- I know that now Inhumans became a standalone franchise,but i always associate them with Fantastic Four and Crystal is probably the most connected with this team.Her powers to control the four elements of earth could give us tons of interesting builds.Plus,she is easy to be in this game,considering the interesting of Marvel to push Inhumans.
Namor-Ah,the first marvel hero.The first anti-hero and much more.He was in every Marvel team and i won't stop requesting him or promote him.He could be a flying brick in game,but also a summoner as ruler of Atlantis.Plus,the ladies needs some half-naked male heroes to enjoy :D
Cosmic/Space
Super Skrull-Gaz could release him easy as a character,considering that he is a boss in-game,plus they could use various skills from F4.In a sense,he could be an alien version of Taskmaster,in sense of developement.
Ronan the Accuser-Clashed many times with Fantastic Four and Avengers,all for the sake of Kree empire.We have Skrulls as enemies in game.We need a hardcore Kree character to unleash mayhem upon them.