I wonder if the other universes were repaired at the end or the collisions meant they were screwed?
As I recall, we saw the universe-spheres reassembling themselves when Barry reversed the damage.
And did Barry create the Burtonverse with his meddling or was this just a messy mishmash-verse?
The point of the "spaghetti" analogy, I think, was that time travelers don't create new universes, just divert themselves into other timelines in the multiverse. But it was unclear whether this was Earth-89 (as the Arrowverse Crisis dubbed it) or some other timeline that amalgamated Earth-89's Batman with elements of the DCEU.