Before anyone jumps in to say, "This is a terrible idea! Totally unnecessary. Toy Story 2 and 3 were great." First, let me tell you this: Unless planned, all sequels are unnecessary. We didn't need a Toy Story 2. We didn't need a Spiderman 2. We didn't need an Iron Man 2. And right now, we don't need a Thor 2 (which is set to come out in 2013). It's not about the numbers, it's about the story-telling nowadays. Yes, there should be a limit (I'm looking at your Kung Fu Panda) but it'll be interesting to know how things are going in Bonnie's house and perhaps we can see them returning to Andy when he has kids (which was what I really wanted because seeing Andy and Woody seperate broke my heart).

I am not a fan of sequels, though. There are some films that should be left alone. But there are some movies (like How To Train Your Dragon) where I wouldn't really mind a sequel because I want to get into that world again. Full of dragons and I absoublutely love the time I spent with the characters. So, I wouldn't mind a second and third one (which are, hopefully, good, if not, better than the first one)
So, I'm willing to give Toy Story 4 a try since I do love seeing the world in a toy's point of view.