I rather doubt that it would be Dean/Gore; however, Dean ( should he be elected, which is so far fetched as to be somewhat more than impossible ), could then put Gore in a cabinet position.
Why on Earth would Dean give all his hard to work to become Vice President? And why, after eight years under a lying traitor, would Gore want to be Vice President again?
I don't think Gore wants to be on the ticket. I think he wants to take the Party back from the Clintons and sees Dean, who hates McAwful, as his pathway to do that.