Where's Sam?

A portal mysteriously appears in the bunker leading Dean and Sam to the world that Jensen Ackles and Jared Padalecki call home. Team Free Will 3.0 must find a way to track down the monster that was let loose in this parallel world. How will they deal with their fans at Comic Con and what would happen if they're the cause of the peril of their doppelgänger? Will they need to search for extra help in another universe? If so, which one?