In one of Disney’s concept art of Big Hero 6’s Baymax, his superhero outfit looked quite similar to another Marvel character’s many armors, and was probably nixed for that reason. But a Brazilian designer by the name of Vinicius Savron took it one step further in that he drew up Baymax in famous armor from other movies and games. Check them out!
Click images to enlarge. You can see other designs of Baymax in famous armor at The Mary Sue.