I'd say that while it's possible to place a field there, it's unlikely.
FIRST Championships has to account for the following:
--FRC Championship Event (5 FRC fields, plus 2 in the pits and 2 more in their trailers)
--FTC Championship Event (2+ FTC fields--figure about 1 FRC field per pair spacewise, maybe 1 FRC/4 FTC)
--FLL World Festival (fits on Einstein Field during Thursday and Friday)
--JFLL
--Hall of Fame
--Scholarship area
--Supplier showcase
--Pit and storage space for all of the above
I predict the following layout:
FRC/FTC fields in the Arena
FRC/FTC/FLL pits in the various conference halls (my guess would be 3, 4, 5 for distance to the arena, with part of 2 as extra space)
Conference/judging rooms, volunteer lounge, VIP area in the America's Center rooms
Storage in Hall 1 or Hall 2, maybe both (crates, field cases).
It would be an interesting trick to get inter-divisional play on a 6th field, but I'd rather see it used as the "hurry-up" field for if a field is more than a match or two behind schedule, or an inter-divisional practice field. Or, better yet: Put the speeches in there and have Einstein actually
finish on time!
