We’ve only had three movies in DC’s Extended Universe so far, but we’ve already got confirmation that at least one of the upcoming films won’t be a part of that shared universe initiative.
Speaking to Vulture, Greg Berlanti — who only just recently confirmed that the movie exists — revealed that Booster Gold was actually born out of a long-in-the-works TV series he planned to do with fellow DC TV collaborator Andrew Kreisberg. But more interestingly, Berlanti also confirmed that there are no plans to tie the film (and Booster’s time-travelling hijinks) into the current slate of DC’s interconnected movies:
As of right now we have no connective tissue to those worlds. It’d be a separate thing.
So after Warner Bros. and DC were so eager to chase after the shared cinematic universe popularity of other studios like Marvel, they're now... trying to have it both ways?
You can see why Warner might be a bit apprehensive about trying to bring in a character as weird and zany as Booster Gold into its very self-serious DC Extended Universe -- but at the same time, what's the point of pushing the interconnected hook between these movies so hard (arguably to the point of detracting from the films themselves, in the case of Batman v Superman), only to immediately start abandoning it?
The joy of shared universes like this is that the serious can sit alongside the silly (just look at Winter Soldier and Guardians of the Galaxy) or the grim can sit alongside the hopeful (Arrow and Flash, now with added Supergirl) and still be part of a larger whole. It's an interesting move for DC to Warner Bros. to make, but one I'm not entirely sure I can see the point of just yet.