The GE-90-115B is currently the only engine capable of powering the 777-300 IGW. Rolls Royce don't even come close with their highest thrust version.
Well yeah, little point in developing a 110,000ib class engine if the airframe manufacturer has said it will only offer one engine choice and you are not it
Lost opportunity yes but not for want of trying.
747 Focal.... You are such a tease...... You can tell us it not like there are any Journos lurking on these pages