He turned 18 in 2004 when he moved in with the Tuohys. Any Conservatorship, if one existed would have had to be approved and ordered by a Judge. You don't just print those papers up on LegalZoom.com, sign them, and have they're notarized. I would also assume, that since he was almost 18, or already 18, that he would have been required to attend whatever court hearing was conducted, in order for the Tuohy's to be confirmed as Conservators. I don't think this guy is telling the whole story, and wants to be looked upon as the victim. He wouldn't be the first ingrate NFL player.
Yeah, they probably just cut him out of the movie deal by mistake or something.
Ask yourself why they sought a conservatorship in the first place. There is no good reason, and we already know the fruits of the bad reason.