No; Regalia is a filler event for people who missed it the first time around; ie for content drought.

The fan fest is a stage to announce new and exciting upcoming content.

I would not expect it to be an announcement other than what they have already announced as it being planned to appear at some point.

That said, I would not be surprised if they showed a roadmap or answered a question confirming it or giving a planned date..I just don’t expect it to get significant airtime.