I'd say opening the movie with that fight would be a good way to bookend the whole thing since it also ends is a knife fight, Also a means to give a re-entry into the plot by checking in with the other Atredies survivors; first Thuffir, and then Gurney before reintroducing Paul in his new visage as the fierce, almost spectral desert warrior he's become with the scene where they take the smugglers.I wonder if he will then have his gladiatorial fight with the captured Atreides fighter, which he almost loses. I don't think so because there's too much subtext going on in this fight and the second part has action enough but it would still be cool since it is one of my favorite scenes. However i'm 100% convinced he will be in the second movie, if only to show how far Paul has gotten.