John Lasseter is back to direct and described it as a "love story" that picks up where 3 left off.

The kneejerk reaction I had was 'why?' but then I realized I had the same feeling about the third when it was announced and that one turned out to be the best, most emotional of the bunch. Hopefully the story will be good and serve a purpose other than lining the Big D's coffers.

Yeah I felt like 3 wrapped up the storyline of the toys perfectly but as long as they keep getting better I can't really complain.