There is a difference between multiple characters in universe talking about the universe getting destroyed and a statement from the author. Keep in mind outside sources had Cell at Solar System busting ages ago but they were barely brought up.
Which is not to say there aren't statements in the comics that support Darkseid as a multiverse destroyer, just that one from the author is different in function(author's opinions can change). As for the thread, as my buddy believes DC wins and he knows more about them then myself I am inclined to default to his opinion on the matter.