I'm hoping they'll continue to expand the ways you can evolve Pokemon in Gen VI. Post suggestions of ways you'd like to see!
One I'd like to see is evolution by fainting. For instance, imagine if the first "lame mammal" pokemon you caught (i.e. Ratatta, Bidoof, Zigzagoon) started off Normal, but if it faints in Battle when above a certain level/happiness/a certain move or move type it evolves into a Ghost type?
Probably too dark for a supposed kid's game, but it'd be awesome.