I'm hoping for an Ice/Dragon that isn't a legendary pokemon. I'd like one with 3 stages, like most other dragon pokemon. I'd also like a Ice/Fighting typed pokemon. I think the combo would be interesting.
Ice/Fighting would be amazing for offensive stab moves.
Fighting deals 2x to Normal, Ice, Rock, Dark and Steel. Ice deals 2x to Grass, Ground, Flying and Dragon.
Defensively Fighting would help out Ice pretty decently.
2x Damage: Fire, Fighting, Flying, Psychic and Steel. 0.5x Damage: Ice, Bug and Dark.
I want them to go all out with non-legend and pseudo-legend dragons, especially if they don't just look the dragon part. Like a Dragon/Rock that looked like it was actually made of rocks and/or crystals, or a Dragon/Grass that's overgrown with plants.
Fire/Electric and Fire/Water would be pretty cool too.