My 5 year old loooves Ariel but has never seen the movie (gasp the horror!!). We leave 5 weeks from Sat and are planning to watch as many Disney movies as possible since there are a few that the kids haven't seen yet.
My kids haven't seen most of the Disney movies but they know all the characters! We just saw a play of the Little Mermaid put on by a group of musical theater students. Both of my girls (and me too) love it! Have fun with your movie marathon!