User blog comment:Random Kid/New Phineas and Ferb Film in the Summer of 2011!/@comment-106029-20100222051251

of course there is more to the Movie, Vanessa working hand in hand with Agent P since he knows Dr. D better then anyone, Doofenshmirtz thinks his daughter has defected to the good side. Maybe isabella is really sad that she has nobody to give a fathers day gift to(quite frankly until proven wrong Isabella's dad's dead in my mind) so she is even more chummy with Phineas then usual, resulting in a part of the movie where Phineas gets annoyed and yells at her only to apologize near the end once he knows the story(that's how disney movies always seem to go and besides it could be a nice little Phinbella scene)