They should do similar to how they opened the Rogue One panel, with the original crawl, which is then interrupted.
I've been meaning to post on this thread, but have been too busy enjoying London for once
I felt overall that Celebration was a tad underwhelming bar the Rebels stuff, though I suppose we did get loads last year.
I went to the Future Filmakers' panel on the final day, which had Rian Johnson (Ep8 director), Lord and Miller (Han Solo directors), Kathleen Kennedy and a couple of others with Pablo Hidalgo.
They brought out the new Solo, Alden Ehrenreich, as well as John Boyega. At the very end Hamill and Fisher made an appearance too (they had been at other panels).
It was a somewhat underwhelming panel, because I think everyone expected something big, like the Ep8 title, or more casting, or the next anthology film being announced, and we got nothing new really.
Despite the lack of massive news, Celebration was bloody ace to finally be able to visit.