Agility dragonite could be pretty cool w/ cameruptite; since it's so slow, dragon dance wouldn't boost speed enough, but agility might. You'd likely have to run +Spe as well, since the meta is going to be pretty fast overall.
Edit: While I'm at it, I'm going to bring up dragonite in general.
I think Sky Barney is going to be really good. It has so many options to play with; all the -ate stones will be good, though glailitite an garedevoirite will certainly be less so, the tough claw stones will all be good, especially metagrossite for sweepers and zardite x for a wallbreaker set, it could use aggronite to become dragon/steel and resist or take neutral damage from all the atespeeds out there, as well as granting it a lot of bulk and a nice boost in power, it could run a mixed wallbreaker set w/ pidgeotite, a rain sweeper w/ swampertite, idk what else. It could even run a tank set w/ vebusaurite or something. I literally can't think of a single stone that it would be incapable of using effectively, though some would be somewhat less effective. It's got really good stats, a great movepool, and multiscale pre-mega to improve its bulk.