The actual plans for Terminal 6 located it immediately adjacent to Terminal 5, on the land presently occupied by freight terminals, right next to Mannheim. Some of the loosely-tossed-around ideas called for T6
to be used by all non-hubbing domestic carriers (Delta, Northwest, Continental, America West, Spirit, etc.), thus freeing up room in T2
for United/American to expand their operations.
The plans I've heard call for the following division among terminals when all construction is complete:
: All United domestic and Ted
: I've heard conflicting stories on T2
. One scenario has it being completely rebuilt to handle Star Alliance international ops. The other has it being heavily overhauled into a respectable United Express facility (United/Star international flights would stay at T5
: All American domestic
: American/Oneworld international ops
: Non-alliance international flights and charters
: Skyteam and non-alliance domestic services
There are long-term plans for a Terminal 7, which will be built on York Road on the western side of the airport (that's probably what you were thinking of). I haven't heard any rumors regarding occupants in that terminal, and with the addition of T4
I don't think it will be needed for quite some time.