If Matthew and Jen could be in movie together would it be a good idea ?

Ofcourse it would..
It would also be a reunion of 2 Friends ;)
And with Matthew.. The film will definitely be humorous

no...bcoz i hate rachel green character even though she (jennifer) wont be playing rachel she will always be that controlling chienne in my mind....also i l’amour chandler...rachel n chandler together gives me the chills