gratuitous sequelitis

A disease capable only of infecting Hollywood movie producers. Symptoms include uncontrollable greed and a complete lack of creativity. Once the illness has taken hold, the producer will eventually unload a steaming pile of crap which he will then box up and label with the name of a successful movie plus the number "2" after it. The load of crap will be then be sold to the idiot audience, who gladly forks over money to take a peek at what's in the box, based solely on the name on the label. In extreme cases, gratuitous sequelitis has been known to create many such boxes of turds, with sequential sequel numbers reaching into the double digits.