GOOD GOD, Stealth Rocks ;-; Don't know about you people but I kinda hoping SR isn't coming back. Like what was mentioned before, it was everywhere back in 4th gen and not to mention it's wide distribution.
Stealth Rock, Superpower, Giga Drain, and Roost are going to be huge tutors. Stealth Rock for obvious reasons, Superpower for Dragonite, Honchkrow (who also gets Heat Wave back!), Giga Drain for Chlorophyll Venusaur and Victreebel, Roost for basically any Flying-type that doesn't already have it (kami trio) or those whose Dream World abilities block it (Gliscor).