I think the biggest DCEU problem is Zack Snyder ,Shazaam and Joker did pretty well but I doubt that adding stuff would improve on the ridiculous plot of the "Infinity Boxes".

Ha, do people say "true" DC fans like they say "true" Star Wars fans? I had no idea...

Anyway, I'm not into the whole marvel Vs DC thing but I will say this - DC superheroes are better served as standalone properties. Teaming Iron Man up with Captain America may have worked for the MCU (where otherwise they'd never have got past a film or two each) but Superman or Batman are both made worse by appearing in "shared universes"...

Besides what's the point of teaming up Superman with Batman in fact Batman would be doing jack shit because Superman is superior in every aspect compared with Batman