I would rather Microsoft and Sony teamed up. One console with guns, blood and realistic racing games for the casual gheymers, and the other with fun, quality games for all ages, for hardcore fans who know alot about games.
Microsoft and Sony joining together would bring Nintendo's sales up IMO. I wish that were to happen.
Or maybe Nintendo and Sega could join forces to bring us the worlds best
gaming console. It would be backwards compatible with NES, SNES, GB, N64, GC, Mega Drive (or genesis), Master System, Dreamcast, Saturn etc. I say the best possible scenario is Nintendo + Sega vs Sony + Microsoft. Companies who can actually make games vs companys who can only get other people to make games for them. Good vs Evil.
.....or something

*shrugs shoulders so high they hit the roof*