You can never trust Wikipedia, but you can ALWAYS trust a fan wiki. They have VERY rigorous regulations and rules about what goes into an article and what doesn't. No "Abe Lincon was a Martian" stuff there.You can't even really trust Wikipedia anyway.
So far, the only internet rumblings of a sequel that have been mentioned that came to fruition was Cars 2. Maybe Monsters Inc, but no one expected prequel. TS3 was a long time planning because Disney threatened to do it themselves, but other than that, there's always rumors about movie sequels over there. Like the Incredibles is still in consideration, but nothing is official. Brad's doing a live action film with Pixar will co-produce, and any Incredibles sequel needs to at least go through him. They would like to, but they haven't the concept yet.