I came. I shot. I moved onto the next.
WEAPONS
Energy Pulse Blaster : Shoots out energy shots (like plasma pistol) but it overloads the enemy with nega energy and stops them, kind of like a plasma pistol does to vehicles. It lasts about 10 seconds.
Gravity Hammer: I know its not knew, but I think that the melee button should cause kind of a golf club swing. Attack can be the regular swing. (it should also last more swings, like twice as long.)
Portable Mac Gun: I've seen it suggested already, but I think if they did make one, it should look like the RPG in Duke Nukem and go on the shoulder. It can only have like 4 rounds, but it would annihilate practically everything in its path. The shooting rate should be once every 30 seconds. (you better keep a close eye on it.)
Grav Bolt: Compresses and obliterates anything in the radius. To use it, you have to capture it. Somewhat like a flag.
Sniper Rifle: They should also add a little radar to the corner of the rifle and they should also add night vision back and several other vision modes.
Spartan Laser: This weapon is great, but it should charge a bit faster.
NEW VEHICLE:
Raptor: A speedy little bike, faster then the mongoose with tiny turrets that the driver can use.
(image. The vehicle in this picture is a T-rex)
http://64.251.10.3/nimg/2006/04/thumbs/lrg_article_5258-img_0 .jpg