The Lonely Dream
I am really curious now haha.
What do you have in mind? xD
Probably make characters both enemy and ally look ridiculously gritty, almost like self-parody. Bowser being the main enemy, having created his own kingdom with the intent to surpass mushroom kingdom in every way, kidnapping Peach just for the sake of pissing Mario off. Probably co-op with Mario and Luigi, each with unique plasmids and skill trees. Traditional enemies become addicted to Adam, creating psuedo-splicers from things like monstrous koopas and goombas with far too many fangs. Big daddies and big sisters would be replaced by weaker clones of the koopalings, protecting disturbing and warped little sister-stand in toads.