I'm guessing the previous She-Ra is Razz, but I thought this quote from Noelle in a sy-fy article makes it sound like it could be someone else:

Are there any Easter eggs that you’re excited for fans to see in the series?

Yeah! There are a lot of Easter eggs in there. I don’t even remember all of them. But Loo-Kee is hidden in a few places. There are a few name drops of characters and places that we don’t necessarily see, and my favorite one is one that is a little bit of a deeper cut, but it has to do with the She-Ra that came before Adora’s She-Ra, who is actually a little bit of a cameo appearance of a legacy Masters of the Universe character. So there is a lot in there, and there is a lot for Masters of the Universe fans to look for.