Yep, I figured Plasma Flamethrower would be an awesome Gallente weapon, too.

Amarr is trickier. Lazorz Gattlin seems like the easy choice, but I'd hate to see a ton of overlap between the Heavy weapons. I feel like each should be remarkably different.

What if it was something like a Laser Cannon? Picture this: Giant Shoop Da Whoop Laser Beam of Death. Good range, good damage, but once you pull the trigger it charges for 0.5 seconds, fires for 1.5 seconds uninterrupted, then cools down for 1.5 seconds.

Fun? OP? Imma Chargin My Laser?

What about something beyond the current tech (in DUST of course)?
I thought on something like a tesla coil that sends lightning bolts that jump from every metall to another so you can vary its range a bit by using the environment.

Or a weapon that does damage over time?
I thought on a weapon that shoots a large bolt that injects nanites to the hitten object and creates some kind of nanite cloud that damges everyone who enters it. If you hit a vehicle the passengers are also affected by it. The cloud and the nanites vanish after 20-30 seconds and fast driving could let them vanish too.

I also thought on a heavy sniper rifle similar to an Anti Tank Rifle. It should have kinda FMJ to pierce through armor and shield and then damage passengers. The damage to Shield and Armor are just low but it could do about 100-150 damage to the passengers and thus be suited to take them out and take over the vehicle.

Another nice gun would be a flak. Not much to say here just a normal flak.

More of this ideas are here in an old and closed thread of my old character.

A heavy weapon that shoots a ball of plasma after charging that does high direct damage (Making it suitable for AV) while also having a large splash radius with low damage (area denial). Kinda like the big brother of the plasma canon?

also self destruct module ..

More heavy weapons are coming.

... I want a battle axe for my heavy...
Screw the butt stroke or the muzzle thump. Battle axe is the future of heavy melee combat.
+1

Laser gatling gun.
Flamethrower with sticky persistent flames to stick to floors, walls, scouts...

More heavy weapons are coming.

Portable Shield Wall - Would take up a sidearm slot. Something like an energy based
riot shield that could be used as temporary cover. Heavy would need to keep it out/deploy
onto the ground or have a small movement penalty while its up. Not sure how the recharge
would work but it'd need to be pretty slow to stop it being abused. Any thoughts?

Missed that post on my first read through Shanks. How would you work the shield?
Moveable or deployed onto the ground infront of the heavy?

Since CCP seems to have run out of weapon ideas for Heavies, let us suggest some.

-Battle Axes

wanted to put my big fat AV chain saw idea in here too. of course it would ! hit infantry its a goddam chainsaw