there kind of is one, in Sofia the First. I know it's about her and not the DPs but they show up to teach her how to be a princess, and she is technically a Disney Princess, though not in the official lineup.

The animation wouldn't be the same (Just look at The Little Mermaid TV series), and just for that, it would be ruined.

With a little bit of pixie dust this might work. Maybe. Maybe with pixie dust and a huge heap of luck. I'd take issue with the voice actors, since several of the originals are no longer living, and it would also be difficult for me to get past the animation. Ultimately I think the DPs are meant for movies, and you can never beat the originals, though it would be great if somehow they could all meet each other. I've always wanted to see something like that!

I daresay they would completely screw up all the princess's personalities. It would be sickening.

Definitely work!

Depends how they do that. I think the biggest problem is that all princesses couldn't know each other (different country or time etc.) and mixing their styles to each other would be very hard. If they just ignore it it would be just silly series for little girls. Nothing bad with that but I wouldn't like it so much.

But it would require a lot of effort in terms of animation, developing good plots, finding good voice actresses, and staying consistent with original personalities; sounds like a difficult but possible task if you ask me.

Of course.

Depends on how they do it.....though I fear if they did it, they would get the personalities of the princesses totally wrong.

Hmm, now I'm starting to get less optimistic about this.
But I definitely think they have a ton of material.