Well it would be hard not to believe in the ideas of such, ya know? I mean Morrison is human like anyone else, being a bit referential (Would it be referential? I dunno long night can't think straight) to the Marvel. I would suspect him indulging even in him noting the Incursion event in Marvel as something to a kid having his toys from different brands or cartoons meet up and play with each other. I agree on the idea that if this would be his masterpiece for his work on comics, him putting at least a nod to the rivals would at least set some sort of joy off, right?
It's a new kind of feeling. Not unprecedented 'cause crossovers and amalgams have happened, but this seems to be of a more "serious" note. An event like Multiversity should in at least someway play upon the wild and outlandish ideas of thought.
Maybe he'll comment about it and say a bit of a hint. But this little nudge to Marvel from DC is something that makes me enjoy comics more. As it should for everyone. Still the hypest shit ever once you kind of come to that idea in your head or at least get it told to you, it's not hard to love comics in this day and age still cause of this kind of batshit crazy idea