Board Thread:General Discussion/@comment-5536445-20190520021531/@comment-5536445-20190520035434

True, but most of those universes are retired, especially the Nolan Trilogy. I only included Smallville because the CW seems to like the idea of referencing it over and over again. The DCAU and Teen Titans would be tough to cross over with due to its...well, animated nature, which would pose problems in terms of how much them coming in for the Crisis would do. It wouldn't make sense to have Bruce Timm's stick-figures punching Shadow Demons, and less sense to cast animated characters in live action.