No it wasn't!! After that day he would have to go back again!!
No he wouln't, see: I know some here right now are confused on whether or not the curse was broken. But through Ted Elliot and Terry Rossio on their website WordPlayer.com they have confirmed that Will and Elizabeth have broken Calypso's curse and that was revealed with the "end of credits" scene.
Here are some Ted Elliot and Terry Roisso quotes that confirm the curse has been broken. Alot of the confusion here stems from the fact that two scenes that would have explained the curse being broken where dropped from the film much to Ted and Terry's surprise which basically screwed up the ending. But over the last couple days they have been telling us how they wrote it and they wanted it convyed to us even though that didn't happen.
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Here are some of the quotes you can find many more but these confirm the curse was broken with the final green flash and what the breaking of said curse entailed.
Rossio: Given the lost information, my prior post doesn't apply. You might be able to derive that the curse could be broken from the information in the film, but it would be indeed difficult.
http://www.wordplayer.com/forums/mov...cgi?read=98662
and Elliot: That green flash was what Terry was referring to when he said it was possible, but very difficult, to figure out from the movie that the curse was broken.
http://www.wordplayer.com/forums/mov...cgi?read=98679
In those two quotes they did confirm that the curse was broken with the final green flash at the end of the credits scene.
And in this post is sorta entailed what the breaking of the curse entailed:
Rossio: I don't know that I would say, "forbidden." There might be some story to be told where Elizabeth manages to make a trip to the land of the dead, with the help of someone, etc., etc., to find Will, etc.
But the basic requirement is that Will agrees captain the Flying Dutchmen (in return for what the film reveals) and that he can step on land but once every ten years, and that at any time, if he finds a love that is true (this is part of the original Flying Dutchman opera by the way) then his attachment to the ship is broken.
http://www.wordplayer.com/forums/mov...cgi?read=98721
Basically what all that said is that due to the fact that certain scenes were cut it is hard to tell BUT STILL POSSIBLE to discern from info given in the movie that the curse was broken. And that the signal that was given to us that said curse was broken was that final GREEN FLASH and that William is now detached from the Dutchman and can live a normal life with his family. He can stay with them as long as he likes and no longer has to to the job that was requried of the Captain of the Dutchman.