At the end of BvS, for some reason, it's Bruce who dies instead of Clark.
And then, some times later, he comes back from the grave — as a vampire.
+ if everyone's like 'bruce wayne was batman, but batman's still there, so who's running around dressed as a bat THIS TIME' ++ for identity porn, i.e: Clark confronting this new batman and having no idea who he might be +++ for the batkids ++++ for Batman actually turning into a swarm of bats and becoming the cryptid he always dreamed of being
Clark/Bruce, Vampire!Batman
And then, some times later, he comes back from the grave — as a vampire.
+ if everyone's like 'bruce wayne was batman, but batman's still there, so who's running around dressed as a bat THIS TIME'
++ for identity porn, i.e: Clark confronting this new batman and having no idea who he might be
+++ for the batkids
++++ for Batman actually turning into a swarm of bats and becoming the cryptid he always dreamed of being