I think this is kind of a long shot at this point but we know that Blackie Rose is in the new movie. He voices both King and... Garth. Now rogues are involved and King is a rogue BUT Princess's original voice actress has not been mentioned of confirmed at all yet. So if she's actually not in it, then King may not actually be in it either and that one rogue is just a King look-alike.

This leaves Garth who has really been just shoved under the bus since the seconde movie. We got a writer from the original A&O movie who assisted in the story writing for A&O 7 and I think if anyone knows what the fans actually want, it's him even if Brent's still around. So could Garth possibly be making a comeback? And Lilly is voiced door Kate Higgins so she could pop up anytime especially if Garth's in the same movie.