On Doris' Madagascar Wiki page, it says that she will be voiced द्वारा Calista Flockhart! So far, we also know that there MIGHT (it is not confirmed, but people think it's possible) be a प्यार trianlge between Dr. Blowhole, Doris, and Kowalski. We also know that from the "Penguin Who Loved Me" poster that she might not have a Segway.
Also on the wiki, it says that it will be the last Dr. Blowhole special(however, I haven't found that anywhere else, and Wikia's can be modified द्वारा anyone, so this may not be true.) If आप guys know anything else, plz tell me and/or post/comment!