If Drew retires, they're going after Stafford. Drew isn't going to retire though, so Teddy will likely find a new home with the highest bidder.
Taysom remains the #3 QB with the Saints for another year because Al Davis is dead and he was the only owner dumb enough to sign an unproven, gadget QB with a strong arm as his franchise QB.
The #2 QB for the Saints after Teddy leaves is TBD.