Most engines are scaleable.
I'm interested in the scaleability of the new Pratt GTF series. So far indications are that it will be scaleable all the way from engines powering the Japanese MRJ 100 seat jet to wide bodies. Pratt may even knock GE from number one position on the A320NEO. I predict that Pratt will have a major come-back in wide body frames and will regain number two position in engine sales but it will take some time. This engine will be a 'game changer'. Long live the dependable flying Eagle symbol on engine cowlings.