Some ideas for new gangs, in generic terms:
1:Bodygaurds gang style split up into the guys that look like the masakos in a different style maybe Private Army.
2:All DLC outfits and vehicles from Saints Row 2 DLC.
3:New Gang style that are american soldiers.
4:New weapons,New Vehicles,New gangs,New gang style.
Bodygaurds split up so the ones that look like the Masakos are a seperate style.
A style that makes your gang look like american soldiers.
Dual Swords like Jyunichi's.
More Sniper Rifles.
Faster fire rate for dual wielding Pistols other than the Kobra.
A Tank like an M1 Abrams that is used by Ultor Masakos and maybe your Army style gang(as a gang vehicle).
New Clothing such as Sniper Ghillie Suits,Military Clothes and possibly Assassins Creed Style Clothes.