If they're going to include throwback Pokemon in this game, there
better be some evolutions for them. It doesn't really look good to have included so many throwbacks without including a new evolution for at least a few of them. For example, I felt really awkward playing BW2 and having half of the Pokemon I encounter be throwback Pokemon and not the new Pokemon. I know, I know, it doesn't look good to introduce non-legends halfway through a generation. Despite that, I felt if they were going to do the BW2 regional Pokedex like that they should've at least cut the focus on throwbacks and put more on the Unova Pokemon. Had Gen. 5 given us evolutions for old Pokemon, I would've felt less awkward.
Basically, I want what DPPt did. They include throwbacks while also giving evolutions to a few of those that are included. This is a nice mix as you have your new Pokemon (Lucario, Garchomp, Heatran), your new throwback evolutions (Roserade, Mime Jr., Weavile), and some throwbacks included yet untouched (Crobat, Gyarados, Machamp).
Just imagine this: Gen 4. but with better designed Pokemon.