He really does hate the pre-packaged meat industry. Once he trusts the teams, he will freely share this hatred with them. He may need to share with them where his fascination with packaged foods in general started, and also why he began to hate the whole industry, and decided to try and dismantle it, one piece at a time.

Meathead planned on only working at Franco's for a few months, but discovered some sort of shady goings-on that seemed very suspicious to him, so he decided to stick around and try and find out what the deal was with these things.

These are some of the things that he's discovered: a) the existence of a top-secret laboratory with a scientist who seems to be focused on something shady; b) that there is a chemical called Mustard-44, which is reputed to be the 'secret ingredient' in all of Franco's Franks--he has personally never seen Mustard-44, but has heard some higher-ups talking about; c) that there is a top executive in the company whose position is called 'Number Two,' and this person runs whatever shadiness is going on; d) that Number Two could be anyone, including someone that our teams have already met.

He's assuming all this funny business will blow over and he'll be able to pursue the destruction of Franco's Franks in peace.