Hopes:
Garchomp gets dragon dance and fire punch, Salamence gets Brave Bird, they bring back the half defense mechanic for explosion xD On a more serious note I'd like it if the dragon of the next generation would be fire/dragon and purely special based with at least 100 base speed if not 101 would be fun to troll with :P they change the mechanics of curse so that the pokemon is still cursed after switching out, an ability that punishes priority users the same way magic bounce punishes hazard setters. something to give hail teams a boost, a fire/grass type
Fears: More over 135 base stat pokemon like haxorus and chandelure, more broken abilities, a new typing, the dragon will be as underwhelming as hydreigon, More steel types, More weather abusers, more ice sharders and worst possible outcome a new hazard i.e. flame spikes burn the user upon switching lol