I think it's actually implied the Tomorrowverse isn't actually the new DCAMU timeline but instead a new multiverse created by killing Darkseid, plus John Constantine is said to be older than the multiverse, so to me, that implies that I shouldn't be putting them alongside each other but rather the DCAMU is the "main" Earth, so no "[New 52 Timeline]", and the Tomorrowverse as [Tomorrowverse Multiverse: Earth-1] or something like that, with everything part of the Tomorrowverse Multiverse being set entirely after the DC Animated Movie Universe. Maybe instead of Tomorrowverse Multiverse, I call it something related to Darkseid.
From my understanding, Super Friends, the DCAU and Teen Titans realities would be variants. Darkseid obviously exists in those worlds, plus I believe it was confirmed by someone involved - I saw it in a Watchtower Database video.
Maybe the DCEU's Peacemaker found his way to the Tomorrowverse Multiverse after his omniversal Mortal Kombat adventures and merged with the new timeline, creating a new animated universe with elements of his past in it... the DCU perhaps? I'm reaching, I don't think that's the Tomorrowverse at the end of Crisis on Infinite Earths, plus I doubt they'd want it to be isolated from the multiverse at large, but I'm just pondering.