But Xizor (and more importantly the Black Sun) already is cannon, so there are possibilities there. Dash Rendar I could give or take.
Xizor would make for a really cool re-canonized villain, but I didn’t know he’d been brought back. I remember seeing the Black Sun and the Falleen species in TCW though.
EDIT: Apparently he has been re-canonized through a Galaxy’s Edge cookbook. Bit odd, but why not. Not sure how official that canon status necessarily is, but I do still like the idea of him returning. The Falleen in general are really interesting and it’d be fun to see more of them.