He got totally shafted by both Ultimate Alliance games, but since Disney owns Marvel, it seems only logical to add Marvel characters to Kindom Hearts. How awesome would it be if he made the cut? It might even inspire me to buy or maybe even know something about that game!  
 
If they did add a Marvel World, who would you love to be in it, who probably wouldn't have a chance in hell?  
 
The others on my list:  
 Carnage, Vision, Apocalypse, Darkseid (mostly because he's not Marvel), X-23, She-Hulk, Thanos, Taskmaster, and the list goes on.