When that eventually happens, I do wish that they use a different character instead of recasting the role of Tony Stark. Retire him when RDJ retires. That's something that I'm actually currently writing for tomorrow's episode, so way to get ahead of it, brother! For DC though, I'm almost certain they're going to be recasting a lot of characters after their Flashpoint movie. It feels like they plan to reboot their whole universe and start from the ground up.

With all of the fantastic elements in their world, I think death is what tethers them and connects them with our reality. It's the most "human" thing that they could do, so removing that from the equation almost detaches their reality from ours completely.