It's all conjectural, obviously, as it's still getting kicked around but I had units from 8 different League races in the mix, with the League doing a lot of specialization and cross-coverage at the elite level. Gaim would be fascinating and I certainly have ideas for specific castes but I won't touch them until the Gaim book comes out as that'll be the template for the race's characteristics.
Truthfully, the League was developed mostly to interact with the big 4 and help drive their structure. I've probably got less than 4-5 pages of notes for their units and it'll require a lot of fleshing out.
OTOH, I also worked out the intelligence services for the groups as well; somewhere I have a ~75% article on the EA intelligence services that I shelved. Probably dig that out one of these days as well. I could fly through these things if it wasn't for the equipment and weapons stats. . .

not a major strength of mine. . .
Matt