Ah, I totally missed that it was a reprint. It's weird flavor for MOM, too, the set where every plane is at war with the baddies.
There were actually quite a few cards that showed the "warning signs" of the incoming invasion before the "main event":




It's the same issue Streets of New Capenna ran into, where they shoved an old-school "there are big setting changes partway through" block story (Innistrad block, Zendikar block, Tarkir block,
gestures vaguely at Lorwyn/Shadowmoor) into a single set, and so you get some thematic weirdness, like how New Capenna is supposed to not have angels but the set has angels because part of it is set after the angels unpetrify.