Okay, I gave DD Latios a test today, and it wasn't bad, at the very least. It's not a bad late game cleaner which outspeeds everything with a DD boost. I know Scrafty is UU now, but if it was acceptable for that thing to have DD set when it was OU, why not Latios? I reckon it should get a heavy OO mention at the very least. I used:
name: Dragon Dance
move 1: Dragon Dance
move 2: Outrage
move 3: Earthquake
move 4: Draco Meteor
item: Dragon Gem
evs: 180 Atk / 76 SpA / 252 Spe
The EVs let you OHKO Hippowdon after SR with Draco Meteor, so I guess unless you run into Skarmory (which can't really take a Gem boosted Draco Meteor very well lategame anyway), you can swat aside any physical wall in your way while cleaning up frailer mons with boosted Outrages.
Whatevs sig. QC member for OU and Ubers, VM me for a look at your analysis. Just make sure it's good.
Also, if you want me to rate your team (OU/DW OU/Ubers), give me a VM. If I don't rate it, it's either 1) it's so shit it's too much trouble, 2) I'm busy, or 3) the team is fantastic and I have nothing I can suggest to you. You should be able to recognise which one.