If I'm remembering correctly isn't the flash related to the reverse flash? Considering the reverse flash is a great ancestor of Barry's long lost twin brother? Maybe that's why the room allowed him to enter.
In the past few years I've been working on a dc sleeve, got batman/superman symbols first followed by green lantern, red lantern symbol and yellow lantern symbols then added small lighting bolts for the flash and Shazam, and last but not least got a guy Fawkes mask and a court of owls mask. The plan is to the whole arm dc.
It's just something about dc, best way to explain it is they feel genuine, marvel superheros seem to always be fighting with one another rather than actually fighting villians. I only read dc(with the exception of occasional dead pol comics, and when I say exception I mean Ill only read the deadpool vs stories and surperior spiderman because that was interesting) marvel just doesn't grab my attention like that, don't get me wrong I'm not hating on marvel, but the popularity of the brand itself doesn't make that much sense to me.
This is a good show don't get me wrong but I'm honestly not liking what they're doing for shock value and to draw fans in. All these people they're introducing are just too old, am I the only one bothered by the riddler being that much older than Bruce? And now zsasz? Not to mention the shortest dude from the batman stories is now the tallest (penguin).
I still really feel like they should bring up the court of owls since they'll always be in Gotham