Boeing 763-246C

There are as yet no official plans for any Boeing 797. Up until a couple years ago, most people believed Boeing's next major project might be a follow-on to the 747 to compete with Airbus's super-jumbo A380. While Boeing pushed developing an upgraded 747 model, most airlines indicated that they would prefer an entirely new design instead. The only publicly released concept I've come across for this potential new-build aircraft is shown below. Boeing's internal designation for this design study was the 763-246C. If it had gone into production, it would likely have been rechristened the 797 to conform to the standard Boeing naming convention. Now that the 787 designation has been assigned, any new replacement that Boeing might launch to replace the 747 would probably be called the 797. Once the 7-7 designations are exhasted, it is unknown what convention Boeing might adopt next. Possibilities include 8-8 or maybe 7--7. Only time will tell. As illustrated in the following image, the 763 concept not only provided room for 450 to 550 passengers, but could be equipped with sleeping berths in an upper deck for longer intercontinental routes up to 9,000 nm (16,740 km).