Thanks for that.The following is on a D&D Beyond blog post, which so far is all we have to go on:
It would be odd for them to mention the gods causing the Cataclysm in their promotional post, if they're intending to contradict that in their actual publication.
Of course odd things happen from time to time - but that post does reinforce my feeling that there is no need to do what @Hussar is trying to do, which is to find an alternative story for the Cataclysm.
EDIT: @Hussar, this isn't a criticism of your project. Just an explanation for why I don't personally feel the need to take it up.