Ghostcrawler said the following during the Q&A section yesterday:
One of the potential ideas we’re considering for a new hunter ability is one where they send all 5 of their current pets to attack, for a short period of time, on a long cooldown. No guarantees that we’ll go with it, but we’re at least considering something like that.
This would be so awesome to have, a big-cooldown CD for an insane burst damage. Gief!