Yeah, I think puzzler stages are something that haven't been approached much in the Smash series. I'd be interested in a stage like Polarium, that game where you have to draw lines through a series of tiles and then the tiles flip over to solve a puzzle. Terrible description, but I'm thinking something along the lines of something like a platform generator on a mainly flat stage, think Final Destination length with Battllefield width platforms popping up here and there and maybe even off the main stage. Plus, Polarium has only been on handhelds so far. It'd be a perfect fit