Ghostcrawler was originally quoted in Curse's interview as saying:
Brian Wood has talked a bit about the new Stampede too in our hunter column, including the initial announcement of the ability and some resulting QQ.
I don't think we have talked about what we are doing for the hunter yet. I think a lot of hunter players have guessed it but the hunter level 87 ability is basically you get all your pets at once for a short amount of time. So if you have 5 pets in your stable, they all come out and do damage for a little bit of time, and that's really fun cooldown for them. I think it increases Beast Master's damage by 80% while they're out, or something ridiculous like that. That's a pretty fun one.
It's open warfare between Alliance and Horde in Mists of Pandaria, World of Warcraft's next expansion. Jump into five new levels with new talents and class mechanics, try the new monk class, and create a pandaren character to ally with either Horde or Alliance. Look for expansion basics in our Mists FAQ, or dig into our spring press event coverage for more details!