Just a random thought I came up with. There's never actually been a western theatrical release of a One Piece movie (Other than a very limited showing of Movie 8 in the US) right?
Well, I think Funimation could take advantage of that with Strong World. They could simply advertise it as One Piece The Movie: "Strong world" (Or just One Piece: "The Movie") and make it a theatrical release, though it probably wouldn't run for long.
To tackle the fact that many people in the west know nothing of Franky and Brook, I think they could do a short recap of the story in the beginning of the movie, using clips of episodes, similar to how they did it at the beginning of Pokemon 4ever, to sort of get people up to speed with what's going on.
Not only do I think it would get more people into OP, but it would probably help the DVD sales and further the possibility of a TV deal as well.
Well, that's my crazy idea…