Gunn is typically very direct when responding to fans about such topics. So, considering his track record (and position as DC Studios' co-head), there doesn't seem to be any reason to doubt him here.

With some highly anticipated DC projects in the works, DC Studios co-head James Gunn is trying to stop rumors from spreading ...

Co-chairman and Co-CEO of DC Studios James Gunn has dismissed rumors about the inclusion of a huge DC villain in The Batman: Part II, effectively confirming that the reports are false. Gunn is ...

Batman has been a part of some of DC's best comics, but these are the by far the worst of the bottom of the barrel.