User blog comment:Justice Avenger/Which young heros you think should be added to The Team?/@comment-4026406-20120617031543/@comment-4928331-20120620122654

I guess I said Universe when I meant Multiverse.

But my point stands. Batman Beyond (and by extension the DCAU) exist now within the DCMU, as a separate, albeit unnumbered "Earth". Just like the YJ show and comics is Earth-16.