Looking fun! Personally I think C and D were awesome compositions and quite "superhero" looking but it will be awesome seeing how your idea comes out.
With the cat's name, I guess it maybe depends on "how" it should be funny? So for example you could call it "Supercat" with the joke being that it doesn't look strong and it's getting dragged around. Or something like "Mr. Fluffypaws the 3rd" where the joke is that the name is silly and over the top, but possibly something an old lady might call a beloved pet. (Also what happened to the first 2 cats ... etc)
Does that make sense? Obviously those names would be a bit long to put on a medallion for a throwaway joke but maybe this helps a little? Also something for the character sheet maybe?