I think given Sami's history with both Jimmy and Jey, him and KO beating them for the Unified Tag Belts would also be a satisfactory finish. I fully believe they intended something like that for a while, too, as they were hinting at it before Vince stepped down, if memory serves right.
Plus, we can always have Sami/KO/Cody vs Bloodline, which is the logical conclusion to all of them reigns, pun intended.