Well... Bowser would, in my view, definitly be playable. No reason to include him and Wario, etc without letting you play as them. My personal belief is Bowser would be with the Minister until close to the end, when the Minister would either take on Mario himself or send someone else to take care of him. Outraged Bowser would either team up with Mario versus the Minister (for the last battle or 1st Minister battle of many) or get KO'd by the Minister and star KO'd into some other characters head, confused, he'd join them... the problem with my theory is Ganondorf, however, unless he eventually decides he wants to control the world or something similar to Bowser above, his character has no reason to ever join the good guys... this is also the same with Ridley if he shows up as playable. As for Wario? I bet PT just gives him five bucks to talk him out of being evil or something.