Is unclear. Especially when Peacemaker and his story is still continuing into James Gunn's DCU. Though maybe to prevent the canon issues, they'll just pretend this is retroactively the DCEU and the following season of Peacemaker is the DCU. Just so they don't have to reference MK in any future installments.

I think it’s the DCEU-

Like James said peacemaker will be canon but probarly like the Project Starfish and Butterfly events minus the Justice League apperence and certain deaths probably since at the time warner bros plan was to reset everything with flashpoint slightly before the reboot.

As for Mk I think it’s the legit DCEU because the Belle reve emblem is the same as 2016

To @Redmii69: Uh, no?