In my opinion there should be more of a selection of characters here is a list with a short description why I think they should get added:
Lighting mcqueen - cars is a very large brand in disney and I know more people would join if he was added.
Mater - mater would be a good choice to add if mcqueen is added because mater is basically McQueens sidekick
Dipper - one of the main characters of gravity falls. One of my favorite shows. He would use the grow/shrinking torch make opponents smaller or bigger as a risk increasing or decreasing damage done by the enemy.
Donald duck - well known as one of mickeys friends and is a big name in the disney universe but nowhere as bug as mickey
Mr mystery - would thow some of the “attractions” or gift shop items at the opponents and is one of the biggest characters in gravity falls
Kermit - the leader of the muppets is one of the disney characters I grew up watching and now i never see the muppets very much and they were in so many popular movies and they need to add some of the muppets but definitely kermit
Phineas - phineas and ferb was amazing with milo Murphys law in the same town continuing the great show. Phineas would have very nice attacks by using the rollercoaster or summing a phinedroid (remember that episode) that could be like hiros special move
Ferb - phineas and ferb was amazing with milo Murphys law in the same town continuing the great show. Ferb would have good attacks by using a invention of theirs or summing a ferbbot (remember that episode) that could be like hiros special move
(I don’t really know anything to put in descriptions so I will just make a list 
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Jack skeleton
Boogie man
Miss piggy
Lotso
Stanford
Edna mode
Syndrome
Screenslaver
Ursala
Dr facilier
Minne mouse
Simba
Ariel
Mabel pines
Perry the platypus
Dr Heinz Doofinshmertz
Milo Murphy
Gaston
Captin hook
Costumes
There should also be different costumes that grant no extra abilities but look great like steamboat mickey or a warrior ralph
Character Ranks
There should be a new rank called orange because all the orange chips are stronger than the purple chips
