@dedede_man I left out Princess Eilonwy because I don't think most people would remember who she is. I know that The Black Cauldron is a very dark movie and typically "forgotten" by Disney, and I believe it was based on a video game (correct me if I'm wrong). I've never heard any requests for Princess Eilonwy, but I'd be curious to know is people are interested in playing with her.
@flamechampion267 I also left out Giselle from Enchanted because Giselle was (A) never a princess since she didn't marry Prince Edward, and (B) although she exhibited Disney Princess qualities, unlike Mulan she isn't featured in Princess merchandise. I know Disney is supposedly working on a sequel, so it'd be interesting to know if people are requesting Giselle or anything Enchanted to play with.
Did any other Princesses not make the list?