I just rewatched the trilogy, and I noticed a rather disquieting detail buried in the infodump about AMAZO in Part 1. They said that Ivo Labs was commissioned by ARGUS to build it to track down metahumans. In
Legends of Tomorrow, Zari comes from a dystopian future where metas have been outlawed and ARGUS hunts them down and imprisons/experiments on them. It sounds like the first steps toward that dystopia have already been taken, although at least the destruction of AMAZO is a setback.
In Part 3, when Deegan was rewriting reality chaotically toward the climax, there was a shot where the STAR Labs building went through some quick changes. There was the Deegan-created version with the Superman logo, a brief glimpse of the SS version from Earth-X, and one with a logo I didn't recognize. I was going to ask if anyone here recognized it, but I decided to look around on the Arrowverse Wiki a bit and I stumbled across the answer -- it was the starburst from
the Elseworlds logo. So it was an in-joke, but not the kind I expected.