I just hope that the Shanks role in the movie ain't about him standing on some cliff and telling us how Luffy has become a great pirate.I want to see much more from RH pirates....
Guys, I wouldn't expect Luffy and him to meet in the film lol. That is a major moment for the manga, the film isn't taking that away from it.
The most I'd (personally) expect is the villain having ties to Shanks and we learn more about his past/motivations, and how that ties into Luffys inspiration garnered from Shanks.
Whether that ends up being massive plot twist or not depends on what the film actually teases. But I doubt they meet