Great but it is not going to happen. Romo has not played a single down and even though the saints got Bush they are not going to give up a good RB for a QB who has not played a single down in 4 years.
Even though McAllister is coming off a major injury, he's still worth way way more than an untested QB like Romo. I bet NO tries to land another draft pick or two for Deuce. I mean they already picked up a pretty good backup RB in Michael Bennett and three might be a crowd.