I never really considered what it'd be like with Wario working for others since he's always in it for himself and with him as CEO it's the opposite and people work for him, but I agree that some sort of tradesman would be a good match with Mario...
I'd love them to do something like the old Wario Land commercials where you think it's a trailer for a Mario game and BAM! Wario jumpscare! It'd be such a cool homage.
Oh there are so many things lol. There's the Luigi's Mansion Beta like @Really Ilini said but also slightly creepy thumbnails I'd come across for a split second (yes that would prevent to sleep for a day). There was also the Sonic CD Majin Sonic...
My username is Cirta because it's the old name of Constantine (the city not the roman emperor, though it was named after him) which is actually where I'm from (not where I was born in but where my family originates from at least). If you didn't...
Funnily enough, the Soccer Rabbit from WL3 isn't Dunk. It's actually his brother Shoot
But now I wanna see how many brothers this guy has. Would be pretty dope if the next Wario Land game, you have to fight another brother who's gimmick was...
I like that each game gets its own villain, because it shows all the different types of people who are even worse than Wario. Though I'd be happy with cameos from former bosses if they're integrated well, and of course Syrup as a recurring...