The MD-11 order with Rolls-Royce engines is perplexing; was the order ever confirmed, and were either McDD or RR wholly behind the project ? If nothing else it would have been difficult to get financing on them, the lessors would have been cautious about being left with an orphan fleet on their hands.
I think you'll find that the MD11s being powered by RR engines in the first place underpinned the financing arrangements for the aircraft. I'm not 100% sure of this, but believe there were some reverse pre-delivery payments (the engine manufacturer paid the airline more than it had to pay to the manufacturer in up-front deposits and payments for the aircraft). It was an "interesting" financing arrangement but typical of some of the AE fleet financing arrangements which were....ground-breaking, shall we say.