I have some ideas.
A handgun, railgun, dual-wield SMGs, underwater rifle, grenade launcher, SAW, and possibly a laser gun.
New maps w/ other game types (like planting a bomb or rescue mission) and additional guns (i guess)...
more game features like voice chat (That actually works!!!!) Prop Hunt, Co-Op Missions...... things like that.... as for guns.... minigun,dual rocket launcher and tanks... to say the least