To be perfectly honest, the Wii version of Thor: God of Thunder looks better than the PS3 and Xbox 360 counterparts. The Wii trailer makes Thor look powerful, which he should be. The Next Gen trailers are less than stellar to say the least. I also heard that there won't be a lot of flailing involved in the Wii version but I'm sure they'll sink in a motion gimmick or two.
I've heard good things about the DS version too. I'll also be looking more into that version as well.
Of course it all comes down to gameplay in the end but this is a movie tie in game that I can say I'm looking forward to.