Here's what I want new Evolutions for:
Muk, Arbok, Stantler, Zangoose and Seviper, Dunsparce, Lapras, Primeape, Sableye, Mawile, Torkoal!, Altaria, Tropius, Jynx
What I want pre-evolutions for:
Khangashan (basically, just the little baby in its pouch), Hypno, Tauros and Miltank (have gender determine if it grows to be a Tauros or Miltank)
Pokemon I don't want evolutions/pre-evolutions for: Farfetch'd. He's too cool for all that jazz. Just give him some new broken item to hold instead, but keep him as cool as he is =)