There Was a Shocking Death On 'Crisis On Infinite Earths' Part 3!

Flash-90 AND Brandon Routh‘s Superman both die!

“Barry (Gustin) and Flash-90 realize the only way to stop the cannon is for a speedster to hop on and run in the opposite direction, which would lead to one of their deaths. This is the moment Barry has been preparing for all season long and he gets ready to hop on, but then Flash-90 surprises him by stealing his speed and taking his place on the treadmill,” EW recaps.

Towards the end of the episode, Pariah gets the seven paragons – Barry, Batwoman, Supergirl, Ryan Choi, Martian Manhunter, Routh-Superman, and Sara – to the Vanishing Point. Once there, Superman dies and gets replaced by Lex Luthor, who used a piece of paper to make him the new paragon of truth.