The news filtering through now is that the 767 deal is off. Rumor has it that the deal was all set up with LAN at good terms for the a/c but due to delays at government level, they were sold to another buyer.
This apparently is the reason that the Chairman tendered his resignation. The political red tape wasn't allowing him to run the company as he wanted.
The will is there, however, to return to London. Just how and when are unknown, at least to me.
As for the wet-leased 757, CAL needs more capacity to JFK and the proposed 767's would have supplemented that nicely. I wouldn't be surprised if the 757 stays longer than expected.