If you do a little search on the internet, there are some sites supposedly leaking the script. Now, heaven only knows if this is indeed the TRUE script or, even if it is the original, whether it will remain unchanged, but anyway, here's what I found:
Note: Bootstrap Bill is Will Turner's (Orlando Bloom) father.
BOOTSTRAP BILL sits at a campfire talking to someone we don't see.
BILL: I need to find him...he's...my son.
VOICE: You have a son?
BILL: Yes.
VOICE: I have a son as well. In these very waters. I'll help you find yours
if you help uncover mine.
The owner of the VOICE leans into the fire and we see his face.
CAPTAIN GRANT "The Sea Sponge" SPARROW: Savvy?
Sounds good