I really love the Metroid franchise. With that said, I don't think Ridley should be a playable character; it doesn't feel right.
Oh, really?
Metroid is about Samus and her constant state of isolation. The only other Metroid rep needed is Zero Suit Samus, as it is still Samus.
Adding Ridley would only help with the isolation, showing how she has to fend for herself, by herself, against Ridley.
Not to mention he looks incredibly demented, which really doesn't work well as something someone would want to play as. I mean, you could shrink him, but he would look like a purple mosquito. That and Ridley should never win; if Ridley wins, everyone dies, he's evil as ****. Sure Ganon and Bowser may win sometimes, but that's temporary and the good guy always comes out on top. Even Wolf doesn't beef with Fox like that anymore, he's a merc, just like Fox.
I'd say this looks just right.
Hate to be negative, but I don't think he's gonna make it as a playable character. The way I see it is that there is an overlaying theme to the characters in Smash to a certain degree.
Mario has his friends
Zelda characters are the 3 Triforce pieces
DK has his best friend Diddy
Fox has his right hand man
Kirby has the dreamland team
Samus is alone
That's a really bad argument if I've ever seen one.
That's just the way it is man.