To quote the Disney Parks Blog:
Our other Disney princesses will also be getting a new home (actually, they prefer to call it a castle) in the all new Princess Fairytale Hall. Aurora, Cinderella and other Disney princesses, such as Tiana and Rapunzel, will greet you in an elegant royal court at the location where Snow White's Scary Adventures is today.
And then when someone asked "what is to become of Tiana’s current meet & greet w/ Naveen?", they got this reply:
Guests will be able to interact with Tiana and other Disney princesses inside Princess Fairytale Hall.
Sounds to me an awful lot like the princes as we know them will be going bye-bye.
Which is unfortunate, because I
adore Flynn and Naveen. They're far more fun to meet than their princess counterparts. My guess is that the only prince whose meet and greet will remain is Aladdin, if only because he's the star of his movie, and Princess Jasmine is a supporting character.