that sounds like an incredible naive idea. And I can promise you that this is never going to happen. 20 vs 20? Yeah, I already in BTB am getting annoyed because every two seconds someone feels the need to leave. A map with every vehicle and every weapon? Never gonna happen. So you wanna have( for each side) to have:
scorpion, wraith, revenant, every 3 warthogs, falcon, ghost, mongoose, and a banshee? Alright, out of twenty people there will alredy be (if we rule out the mongoose) at least 13 in a vehicle. The other seven are gonna have sniper, sl, rockets, shotgun, fr, gl, hammer, pl and a sword.
Not in this century, dude.