I watched Gunn's Suicide Squad recently and here are some thoughts and how I would book DCEU.
Warner bros should use Harley and Waller in the DCEU to set more films up in the DCEU.
Waller for Skwad and potential Batman films and Harley for Batman and Harley team up films.
In the DCEU the following know who Batman is and they are Waller, Lex, Deathstroke (via snyder cut ending) and I am sure the Joker knows too.
WB needs to just cool down and make sure they USE Cavill right and just to be sure to lock their actors in set contracts like MCU has and keep Affleck for a little while longer like please. Also they need to not go against the actors and not stress them out either in putting too much onto them.
So much potential WB please USE IT!!!!!!