There's a scene near the end where Barry sees all the different universes and they are filled with cameos of famous Batmen and Supermen and one of them is Nic Cage's un-filmed Superman Lives version where he fights a giant spider.
Oh, that is rad! I heard about that debacle on the weekly planet pod! Mah boi filmed some scenes for that? I thought they only got to spending money and a costume fitting before canning it.