Ill support the Night Elf Paladin as long as Blizz gives the horde Forsaken Paladins. That is possible as well. They can spin in the sense that the naaru "heal" them and they start calling themselves the Forgiven (like Taurens have Sunwalkers). Sir Zeliek was a paladin and he would be walloping you with holy abilities in the 4HM encounter.
Pandaren will be able to become paladins after the rise of Bolvar Fordragon Lich King Extraordinaire and half time Azeroth defender patch, where they revamp the DK starting area.