Ewoks are my favorite SW species. so I'd love to see them cameo, possibly with Luke meditating on Endor and visiting Wicket and the rest of Bright Tree Village.
Then for species not seen on screen yet:
Chiss
Zeltron
Sith
Herglic
And Yuzzem, for starters.

Then for species not seen on screen yet:
Chiss

Zeltron

Sith
Herglic
And Yuzzem, for starters.