I know I know, God is eternal, he can't die, but, if you read two passages in the bible, it seems to indicate otherwise and both were said from God himself. The first is "I am the alpha and the omega, the beginning and the end" one can perceive that as, he's the end of the world before his kingdom can come, another way of perceiving that is, he literally is the end, so, if he dies, so too will everyone/everything eventually is how I see it unless he makes it so we can survive without him. The second one is different though, it basically states it and it is "For you shall have no other Gods before me, for, there are no other gods beside me, nor has there ever been nor will there ever be after me." The part I want you to focus on is the underlined, more specifically the part where God says "after me." Why would God say "after me" if he can't/won't die someday? We know he can see the future so, he must be aware of his death someday.
So again, What do you think will happen when/after God has died or, is he already dead?