It’s an odd, disorienting comic which uses an old minor DC character, Rose and Thorn, to travel through different future landscapes (President Super-girl’s late 21st Century, Batman Beyond’s 22nd Century Gotham, Kamandi’s 23rd Century and Tommy Tomorrow’s 24th Century). Rose is immortal and uses medication to suppress the violent Thorn.
Visually, it’s an attractive issue with different artists assigned to representing each time period. Jim Lee, as always, provides stunning pages.
At this point, other than being a build-up to reintroducing the Legion, we don’t get to see the Legion yet.