Jedi Master Mace Windu event-Is it ever coming back?

They canceled it for lack of interest.  

No. If you didn't unlock JMMW already because a lot of people were saying he sucks and isn't worth the effort, you missed out. He's never coming back. Legendaries and GLs will now have 2 appearances: one in Era, one out of Era. If you don't get them during either of those events, you never will. It's the new exclusivity model. Did you miss the forum post announcing this update?

Why needs JMMW anyway? He sucks, right? He's so bad in GAC. OP should be happy for not having that waste of space in their roster. 

SWGOH Events states the following:

Beset on all Sides

COMING SOON
Last: 2026-02-03

When soon actually is..............you can draw your own conclusion.  He must be pretty close to becoming permanent soon though.

I did miss it. Thanks for posting