Also, I've been sometimes checking out this movie news website called "worldofreel.com" and they've been posting good & legit info on a number of upcoming movies as of late (they've been right and on the money with a lot of their movie scoops). They posted that there have been some test screenings of The Batman that have been shown at Warner Bros headquarters.
Do NOT click on the SPOILER link below if you want to avoid some potential spoilers.