User blog comment:Ḡwẵine Ḹٍٍkƨ Ĺiĸe Ͼềлȑềd/Will Turner in Pirates 5/@comment-74.193.160.126-20120312212514/@comment-1984959-20120317021818

Lee didn't seem like he didn't want to return, especially with appearing at the Pirates event at El Capitan(see 2:23-7:30 this video). Though he said that Pintel and Ragetti not appearing in OST was a "this happened for a reason" sort of way...a reason beyond Mackenzie Crook's statement that he wasn't going to return to spend time with his family(personally I think he only meant he was going to take a break, as they didn't contact him yet).

So I'd imagine with all the fan responses of the absence of the Pearl's crew should bring them back. Just to point out: I'm not saying that they'll be back, but you'd be surprised by the power of the fans' demands(well, not the plot and such, but cast and crew returns; otherwise we wouldn't have Norrington in DMC and AWE).