I'm planning on doing a Marching Band/ コンサート band made out of ディズニー characters. How should I do it?

Should I allow people to choose from ALL ディズニー 映画 または a select few? Should I do a poll? Answers? Both? Should I just pick them myself? Should I select a few movies/ franchises to use? I know the idea is a little far fetched and stupid, but I want to combine two of my お気に入り things, band and ディズニー (I'm in a marching band and コンサート band) but I don't know how!