User blog comment:Hawkinz340/What Are the WBP doing right now?/@comment-4620768-20130721010543

You're forgetting that Kaidô tried to ambush the Whitebeard Pirates when they were preparing for the battle of Marineford. At the contrary, the Red Hair Pirates helped the Whitebeard Pirates twice, by stopping Kaidô and ending the battle with the Marine. So, if they were to ally themselves with an Emperor, it would be Shanks.

Blackbeard has seized control of his former captain's territories and I don't think the Whitebeard Pirates gave them up without a fight. So, I guess Teach has already defeated his former crew but who knows what would be their fate after that... Maybe they dispersed or maybe they're still active but weaken.