Looks like the CW has greenlit, at the very least, a pilot for a Brazilian Wonder Woman, who I think will debut in the upcoming Future State comics.
Based on the timing and that it's a female superhero, I am thinking this may be CW's way to fill the hole Kara will leave behind.
While Superman and Lois will be around, that would leave no CW show with a super-powered female lead. Legends of Tomorrow has a female lead, but it's a superhero team.
Supergirl would leave an absence for a show that centers on a female lead and cater to the fanbase Supergirl has created.
I'm looking forward to it, but I am a bit surprised it's not going to be Diana.
From the looks of it, it seems Superman, Batman, and Diana have all been around before Oliver's Green Arrow in this post-Crisis world.