FINDING NEMO II STARRING ELLEN DEGENERES AS DORY

Finding Nemo was a wonderful movie that the whole family enjoyed so why has there not been a FINDING NEMO II STARRING ELLEN DEGENERES AS DORY . They have made sequels of so many movies, some even 3 or 4. So what's up with Nemo.  I think it would be interesting to maybe have Nemo as a teenager off to explore the ocean and Dory is to tag along, bad memory and all to keep Nemo out of trouble. Can't you see all the mischief they could get into. Come on let's let DISNEY/PIXAR ANIMATION STUDIOS  KNOW THAT WE WANT A FINDING NEMO II.  WHO'S WITH ME.........