No other animated Star Wars movies have been announced for Disney+ at this time.
Star Wars: A Droid Story was announced by Disney and is an animated movie being produced by Industrial Light & Magic as well as Lucasfilm Animation exclusively for Disney+.
Lucasfilm’s first foray into animated Star Wars movies, admittedly, didn’t go well.
We must caution that this is simply a rumor timed to Star Wars Day, and should be treated as such.