Hey Butch,
Remember, its the same size 'width wise' as an A-380, and the A-380 is getting into many airports with no issues.
I believe it would fall in a similar weight field.
Also, the design gives the aircraft (vessle) a more economic fuel burn, only needs 3 engines instead of 4 like the A-380, and can lift more weight with its wing/body design.
The 'refueler' version that USAF is having made as a prototype to check out will be a 2/3rds scale version with only 2 engines instead of 3.
I dont think they know what the weight would be yet. I would think the same as a 747 with the new composite technologies they would put into this, if (if) they make it.
Bill