Nope I don't think they will, there was lots of speculation that it was a possibility at some point and jennifer, david and lisa said that they would have been up for the movie but not sure on the other three. It's a shame really because everyone knows it would've been awesome and would've made LOADS of money!!
It would be nice for them to make another season, just one i dont care, but they all have kids and they all are a little old, it just wont be the same.
I have a good idea what the next season could be too. Monica and Chandlers kids are older and they end up having another one themselfs. Phoebe and Mike have a kid, Joey finially meets the right girl, and Ross and Rachel get married again. They all live happily ever after, (Til the next season).