I would personally like to see nightcrawler 
The guy that turns into an Ant!
Who turns into a ant?
Ant-Man, lol
I’d love to see gambit. He was my fave xmen character. 
also like to see Kitty and Jubilee
War Machine baby! They already have 2 Iron Mans and Iron Patriot is in the files. Can’t be that much extra work.
My short list: Beta Ray Bill, Mr. Fantastic, the Thing, Rogue(you have multiples of this one), Carnage, Rhino, the Mandarin.
Ant man does not turn into a ant… He can either shrink (maintaing his normal sized strength) or grow really tall
Jamie Madrox.
Silver Surfer… I also love nightcrawler…
Post characters you want at Most Wanted characters.