World-of-warcraft – Do I need to buy Mists of Pandaria to participate in pet battles

All of the new talent specs are on Battle.net and have been for months, now. Basically, talents have been changed from trees to tiers. Since Blizzard saw that most players chose the same talent points for particular specs, they turned most of those talents into base attributes of the class and specialization.

The current talents are primarily skills. From each tier, you can only choose one. And Blizzard has stated that you will be able to change talents easier, including no longer having to reassemble an entire talent tree whenever you respec.

Please note, as on the linked page:

All specs, spells and talents are not final and may change during the development process.

Yes, he does. You can find him in the Valley of the Four Winds, where he has his own quest line. Among other things:

He is now accompanied by his annoying niece, Li Li, making the duo suspiciously like another uncle-niece team from another popular Blizzard game.