while I'm fine with Douglas as Pym I can understand the disapointment very well.
Imagine you're a big Batman fan in a world where no Batman movies were made. No Burton-Batman, no Nolan-Batman, not even the Schumacher movies.
So, you waited until now for Batman on the big screen. And naturally you want it to happen.
Then, finally, a Batman movie is in the works, but the creative people are big fans of Batman Beyond (which is a great show, btw, don't get me wrong)
So, the first Batman movie ever features Terry McGinnis as Bats and Bruce Wayne, although played by Clint Eastwood who is a fantastic actor, is old and sidelined to the mentoring Obi-Wan role.
And to top that, through the circumstances surrounding the production of the movie it is extremely unlikely we will see Bruce Wayne taking up Batman persona on screen in the forseeable future because of that.
I can see the dissappointment