I mean, Supergirl got a show before Superman did on the CW. They could only show him in sillhouette or his boots initially and it was a while before he got his own show.
Did Ian Glenn's Bruce Wayne ever once put on a Batsuit on the show? They could show him briefly in-suit in a general way but they couldn't do a full-on Batman.They had some of the rights to the villains but that is long gone. They have nothing with DC anymore.
Batman has appeared very briefly in Birds of Prey pilot and in Titans so it definitely isnt anything outside of WB just being WB.
I think Batman is more likely to be in the GCPD show, but there are ways of getting around Pattinson if Batman shows up.
The only tie to the Batfamily will be the adoptive son, whichever one they end up using. The rest of the cast are villain kids.
Unless these villain kids end up taking on established Batfamily identities, this isn't a Batfamily show.
People enjoy it? It made it to three seasons?