I think the best bet for a Mario movie would be some kind of blend/mishmash of elements from various games.- Mario & Luigi (for the two character dynamic)- Paper Mario (for conflict ideas/sub-plots and side characters)- Mario Galaxy (A good sense of scale)I think the thing a Mario film could capitalize on is that Mario has plenty of story ideas, but they need expansion. I could see them making an interesting character arc out of tying something like Rosalina's back story to the Bowser conflict in an expanded Galaxy story.As far as other franchises- Zelda is the most likely candidate, whether or not it'll yield the best result, given the brand power, a decent cast, and a world with established lore but still room to expand.- Metroid would be interesting for something Sci-Fi/Horror esque, but the one issue would be how to fill the time given Samus doesn't often have company for dialogue- F-Zero might be cool for something in the vein of either 60's Batman or B: TAS, depending on whether it goes for campy action or trying to make a somewhat ridiculous idea serious- Kid Icarus Anime was something I've wanted since that game came out.- I'm not familiar enough with Star Fox to comment, but the one thing that makes me skeptical on that is that the continuity seems to be all over the place at times.