UU/BL is going to be really interesting this time around with so many new things (by sheer volume) forcing formerly good pokemon down. I mean OU pokemon last time around like Infernape, Swampert, Latias (only because Latios exists although there are certain advantages to using it), Cresselia (with all the new power, Cresselia might finally be UU seeing as no one uses it and you need something to take base 147 Outrages in UU unless Haxorus gets banned which would be totally understandable), etc as well as new ones like Haxorous, Chandelure (without Shadow Tag, I wonder how that is going to work out, ban S-Tag in UU?), Zoroark (bleh, ignore this at your peril, I see this as BL-low OU), Kyurem (I predict this to utterly destroy much of UU and totally BL, I'm disappointed people don't use it because he's awesome), etc.
But I doubt Salamence will ever drop to UU (or even be allowed). It's power is still phenomenal and it no longer needs +spd natures usually since tying with base 100s seems a bit pointless this time around since things are either faster or slower. Draco Meteor+/Outrage spamming is deadly and unlike Haxorus, has a fire move to kill through common Nattorei, Forretress, and Skarmory (although all of those would need to beware of +2 Outrages since even they are 2 hit koed, Skarmory could Whirlwind and Nattorei paralyze and Forretress Counter but ouch). Being able to hit both sides hard with the almighty 140 Draco Meteor and 120 Outrage resisted only by Steel hurts. And you could double up on Dragons since there are only so many steels that can be had on the opponents team and Salamence can clear the way for things like Latias/Latios, Garchomp, etc. Having 2 things to tear apart the opponent's team with Draco Meteor hurts and while Salamence's isn't as strong as Latios' or Sazandora's, it hurts a lot and still 2 hit koes many things (140 stab hello). Intimidate is also useful to weaken physical hits. Salamence can also run bulky (although I prefer Dragonite for that, Salamence does have some useful things there too with Wish and Intimidate).
What do people think of Dragon Dance/Brick Break/Outrage/Fireblast? Brick Break still hits floaters and Fireblast/Outrage still kill everything else (except things like Porygon 2 which will give trouble). The power of 607+Life Orb (after 1 Dragon Dance) is awesome. Still, Salamence is thankfully held somewhat in check this time around with things like the new and improved P-2, Latios (before Dragon Dance), Voltlos (before Dragon Dance and could paralyze), Tornelos, Latios, Scizor and Starmie are still around, etc. Still, Salamence can still do the holy terror and kick butt so it's still freaking awesome.