I'd bet Petreaus is only temporary until they can pick a permanent replacement. Right now they're ushering McChrystal out through the back door and not allowing him to return to Afghanistan. His service is over immediately. They need someone to watch over it in the interim.
“I’d bet Petreaus is only temporary until they can pick a permanent replacement.”
I would hope so. It really would be a Slap in Petreaus’ face if he was kept in that role.