I know that Shrek 3 just left the theaters, but Shrek 4 is expected to released in May 2010.   That is over 2 years from now.   For those that gasp and think that is enough Shrek, the box office sales prove that people have not had enough Shrek.   This one those animated movies that keep on going and going.     We have already seen Shrek get married to Fionna, Shrek has met the in-laws, Shrek and Fionna have had kids.   It will be interesting what Shrek 4 has in store for audiences. 

Shrek DVD Set