i didnt see the livestream but i think shrek would win because oz is just a regular guy behind all the smoke and mirrors and shrek is a powerful ogre and some people might think he is dumb becuase he is an ogre but he actually proved to be quite sharp and i think he would figure out that oz isnt really a wizard and he would go back there and beat him up like he beat up all those knights in the first movie so thats why i think shrek would win