Somewhere between Smash Bros and a volleyball competition is local multiplayer Barabariball, a 2013 release by Noah Sasso. BBB will release in a 3 games-in-one package called Sportsfriends for PS3 this fall, then for PC/Mac right after. I watched all of the game's trailers and am most impressed with BBB. Not only are the game's aesthetics looking great, but gameplay looks really fun. Movement reminds me of the obvious, Smash Bros but with a hint of Super House of Dead Ninjas. Floaty and brutal.
I'll keep my eyes glued to Steam until it's release for betas or demos.
Check this gameplay!