Hmm... not sure about the third one. Back in 05/06 I heard that the storyline was going to be centered around a Buzz Lightyear recall and the rest of the toys just happening to tag along to Taiwan. Interesting, but I'm not sure how they'd make a full movie about it. I'm sure I'll see it though, since I saw both of the other movies in theaters.
Hard to believe it's been 13 years since the original... I feel old.