Board Thread:General Discussion/@comment-1038387-20200115112635/@comment-33815247-20200117170351

KylieMfever wrote: Treating the universes, in the crossover, as the real deal would open a massive can of worms. They only showed Earth-89 (supposed Burtonverse) for a few seconds, and had the Joker be alive. Treating Earth-89 as the actual Burtonverse would cause problems. Have they retconned the death of Jack Napier? Or is this a separate Joker, who've emerged in the years since? No doubt, it would probably cause a lot of bad edits, by editors who assume one of the two scenarios to be the case (without definitive proof).

Then, of course, is the Darkseid issue. He is mentioned in the Justice League movie. However, Darkseid was also on Smallville. Chaos establishes that there is only one Darkseid (him), in the entire multiverse, who travels between different realities. By treating Earth-167 as the actual Smallville universe, we'd end up in a scenario where any mentions or appearances of Darkseid in the DCEU (and any other continuity, that this crossover have placed within this one multiverse), would have to be considered a mention or appearance by Darkseid (Smallville).

I agree that the cameos, especially Smallville, Donnerverse and Burtonverse, should not be treated as the real deal. Although it should be noted that the Darkseid from Smallville Season 11 could simply think that there is only one of him and doesn't know about the other. Then again, based on Lois's dialogue alone, it's highly doubtful that the events of Smallville Season 11 even took place on Earth-167.