That was one hell of a finale. So much crammed into one episode. I love the introduction of new villains. They've answered the question I keep bringing up of how does Bruce become Batman without everyone knowing? He doesn't. People know.
It's upsetting the next season is the last but it looks like they pre-filmed a bunch of it. They probably knew the show wasn't going to be around much longer so film ahead to give the studio no reason to not at least air the ending of it all.