Batman Beyond Question
 

In which order should I watch the following (what is the correct chronological order):

Batman Beyond Seasons 1-3
Batman Beyond: The Movie
Batman Beyond: Return of the Joker

Thanks for the help!

Skip Batman Beyond The Movie. It's just the first two episodes of the series.

I don't think it's ever explicitly stated when Return of the Joker takes place but I'd recommend watching it after seasons 1, 2, and 3.

Then watch the two-part episode "The Once and Future Thing" from Justice League Unlimited.

Finally after everything else watch the JLU episode "Epilogue".

Terry McGinnis also appeared as Batman in the Zeta Project and Static Shock, although I don't know if those episodes are in DVD.

Isn't ROTJ supposed to be the unoffical series finale?

If anything, it acts as a (horrific, depressing, and completely amazing) finale to the original Animated Series.

No, if anything, that would be the JLU episode "Epilogue".

Yeah that was a great episode. One of which I had no idea existed until way after Batman Beyond was over.

My suggestion

Batman Animated Series
The Mask of the Phantasm
Superman Animated Series
Justice League
Batman Beyond
Batman Return of the Joker
Justice League Unlimited (or at least save "epilogue" for after you watch Batman Beyond)

Those were incredible shows and probably the best cartoon series ever. Being able to watch them all in order on dvd was a real treat.