The center of lift of the hyperjumbo IS directly above the landing gear (resultant center of lift of both wings).
I got that Idea. But the center of lift has to move forward on landing since your rear wing is used as elevator.
Just to clarify, the projected CG and center of lift characteristics of this aircraft is similar to that of an aft-mounted engine aircraft like the MD-80 because it's 6 engines are practically mounted aft.
Thats clear. Like i said, an forward swept wing brings in Aeroelastic problems, the bigger the wings size the bigger the problem gets. Adding 6 engines onto that structure should size that problem to another level.
Your design looks futuristic but in my opinion it is more practical to use an (Beechcraft)Staggerwing like boxwing configuration with classic elevator and rudder.
This also provides chances of turbine driven E-fans.
Greetings,