Well, I was bored, so I decide to write down a list of all the old TMs that aren't Emerald Move Tutors or D/P TMs so we have some kind of basis:
Razor Wind
Whirlwind
Horn Drill
Take Down
Bubblebeam
Water Gun (LOL I LOVE RBY)
Pay Day
Submission
Rage
Mega Drain (we have Giga Drain, so whatever)
Dragon Rage
Fissure
Teleport (LOL I LOVE RBY²)
Bide
Selfdestruct (hey Mewtwo)
Egg Bomb
Skull Bash
Sky Attack
Psywave
Tri Attack (hey Togekiss)
Headbutt
Curse
Zap Cannon
Sweet Scent
Dragonbreath
Mud-Slap (jesus I hate GSC)
Defense Curl (jesus I hate GSC²)
Nightmare
Whirlpool
Dive
... Well, that's it. A pretty sucking list, I say. Out of those, only Tri Attack, Curse, Zap Cannon, Dive and Nightmare are really wanted. Bubblebeam, Horn Drill, Fissure, Submission, Whirlwind, Dragonbreath and Headbutt are good gimmicks that might come to prove themselves useful.
So, we have 12 attacks. Emerald had 20 Frontier Tutors and 10 Hoenn Tutors. If they decide to use the same number for Platinum, we can hope they'll do something good. Possibly, the return of the Elemental Punches, Softboiled, Counter and Icy Wind! The sucky part is that we will have things like Lucky Chant too ;[
And something interesting I noticed is that there wasn't a single RSE move taught by the Tutors back in Emerald. I hope they don't decide to mirror that and prive us of Nasty Plot/Earth Power Tutors! But we might get Wish/Baton Pass instead, so whatever. As long as Gardie gets Baton Pass, Toxicroak gets the Punches and Froslass, Nasty Plot, they can give Gengar Aura Sphere for all I care. [/fanboy]