Look, Superman and Batman are the linchpin to everything.
No matter what time or universe, some version of you two exists! And when that balance is upset or uprooted — and you can call it a cataclysm or an apocalypse or a crisis — it upsets my life in the 5th dimension… that ticks me off!
So… this was all a test… a chance for you two to get ready.
And for you to realise how important you are to each other.