User blog comment:Bowl108/Signs Point to Phineas and Ferb's next season to be their last/@comment-4002575-20120521112752

This is about the first paragraph. What A Croc! is airing on the 1st at 9:00, so that should probably bring up the viewers based on what this says. This is about the third and fourth paragraph. Those shows weren't as popular, and all age groups watch this. Gravity Falls has a TV-Y7 rating, I think. Plus that theatrical movie in '13 (which you mentioned), that should get everyone in. Wait 'til they start advertising that. Everyone will be talking about that. I know those other ones should get a lot, but movies are usually out for at least a month, so you can watch 2-3 movies in one month. :) So, based on this show's popularity, it should get by Season 4 with another one.