Oh, man i would love to see a BF3 but what they have to do is increase the unit cap to something higher than 16(on each side) cause that just wasn't enough.
They also have to improve the ai 'cause having a transport ship loaded with guys fly into a ship and explode when im trying to fire a rocket at a frigate is just frustrating.
Also i hope that with the clones they add more legions than the 501st legion and maybe they should add some more eras like the mandalore wars but that would probably be niche market stuff, but what i would love to see implemented is a more dark, gritty approach to the star wars combat(think Republic Commando) like with grapples, close quarter strikes and blood spraying on the screen.
Overall i think it would be a great idea, andi would love for all the maps to make a return and the hunt modes(gotta love wampas) there was only three things i had a gripe about in battlefront 2(i though 1st one was perfect) the overpowered droidekas and bonthan spies, no saarlac or tuskens in tatooine and the 501st legion being used for every clone battle.