Well, it's not like we DON'T have a reason to be concerned. I liked some aspects of BvS, liked SS a bit more.....but neither blew me away.
I've been waiting most of my life for these characters to be realized on screen in the way that DC and Marvel have attempted to do. So far, Marvel has faired better.....and I'm not really one of those Marvel fanboys.
DC has been floundering and has had many birth pains regarding these movies IMO.
I know that's the case, because I'm a huge fan of practically everything they produce for television and straight to DVD. They really knock it right out of the park. With the exception of the Killing Joke (which was controversial to say the least), they really know what they're doing.
Supergirl, Flash, LoT, Green Arrow, Constantine, Lucifer, etc....all well done. Not all direct translations of the source material either, but nonetheless, well done.
What DC/WB really should do is evaluate who the fans respect and who has produced what the fans have wanted. Then they should put those folks in charge of everything else.
Geoff is a good first pick, but there are definitely others that should be in the loop (Dini and Timm are two for certain).