...There's not much reason to think that Wolf Link has much of a chance of being playable in Brawl, though I wish he would be, but I doubt it.
But if they can have an Ivysaur dash across a stage then animating Wolf Link would be a cinch in comparison.
But even though there are a small handful of actions that can be thought up to use without much thought, that probably isn't enough to save enough time and trouble for them to find it worth adding this character as playable.
For just one taunt, he could stretch as he does in TP, and he as well, for a special have his Spin Attack, though because it's different, it isn't like Link's ^B recovery special.
It would be instead used as his vB special, and his recovery would be like his jumping lunge performed by locking onto a target and simply pressing A in TP, powerful and travels decent distance.
As for grabbing, well, I thought Midna could be on his back, seeing as she was in TP. She could be used to grab the enemy, and for pummeling them, the Wolf would bite at them at a pretty good speed.
And for another taunt (+v is the particular direction I have in mind), he could howl as he does in TP, and if after pressing d-pad (+) down (v), you hold A, then you can howl in the three different pitches by tilting the control pad up, down, or keeping it neutral.
And for the Final Smash, it could be the move in TP that is used by holding down B, that in brawl, would cover the entire stage that circular area that locks on all targets it comes across.
After expanding across the whole stage, it stays for around 5 seconds, locking onto any other that land on the stage after it had completely covered the stage, all the while Wolf Link is immune to any attacks (invincible), so it cannot be interupted.
Once the period of time of locking onto foes ends, whether they are in the air or not, Wolf Link dashes through the air at near instant speed at all targeted foes one by one tearing through them causing 50% damage and probable KO.
As for physical attacks, they would consist mainly of claws and biting, and his side and standard specials I still am unsure of...