I think DCEU needs to explore more about Batman's world. I want DCEU to put more Batman villains into the universe not only Deathstroke. What I mean are like Mr Freeze, Poison Ivy, Bane, Cat Woman, etc. But I think Riddler almost get a reference in Batman vs Superman: Dawn of Justice. And that's what i'm happy about it. Another think, i'm also happy that Penguin is in the DCEU, he is described as the owner of Iceberg Lounge. I hope that Joker will appear in The Batman. If he appears there, maybe he will be a secondary antagonist with Deathstroke being the main antagonist. Maybe Cat Woman will also fit in there, maybe she will be a mysterious woman who is an enemy but also a love interest of Batman.