We have Natu, which evolves into Xatu. What if we get an evolution for Xatu this gen called Yatu? (because of Pokemon XY)
Silly reasoning I know but Xatu could do with an evo and Yatu seems like the perfect name.
Again, Pokemon who with base stats over 465 usually don't receive evolutions. Xatu's base stats are around 470, so tough luck. The only thing they can do is make a split evolution, but it'll only outclass Xatu, and we don't want that to happen.