The way I recall it in the Last Jedi a call was sent put to old allies...they didn't make it in time for The Last Jedi...but I am assuming they will come together for a big battle royale. People have already speculated on Lando who seems obvious. What other possibilities? I am assuming the survivors of the final season of Rebels...not a starring role but a clear cameo. Well Maybe the return of Ashoka??? Wookies? The Hutts? I understand Janna was a big shot but not the only one. Some might have been more reasonable. Corellians? Manadalorans? Who else am I not thinking of?