It's possible, I suppose. Some people believe that Mario and Sonic at the Olympics symbolizes a trade between Sega and Nintendo. Sega gets to make a game featuring Mario, that being the Olympics game, and Nintendo gets to have Sonic in brawl. However, I doubt this theory, as Sega may just be paying Nintendo for basically publicity, which is already win-win as it is.

So, I wouldn't really count on it.