User blog comment:Mobo85/Disney Channel Gets More Animated In 2012/@comment-5151799-20120312235225/@comment-68.231.86.69-20120411023948

Well I could be wrong on this but in 2013, the feature film in the theaters makes things sound like the series will end in the movie. Again, I'm probablly wrong, but Phineas and Ferb has been going on for awhile now.

I don't want it to end, but I'm just saying, there have been twists and turns in the series ever since Season 3 began, so we'll have to see what surprises Season 4 gives us.

Point is, I think the series finale is the feature film in 2013.