When Are We Going To See the "Proton Cannon" In The Iron Man Films?

The Proton Cannon

One friend asked me regarding this one, and I just laughed at it.

Anybody who has played Marvel vs Capcom certainly knows what the Proton Cannon is: its the uber-big sucka that comes outta nowhere via a hologram of some sort used by Iron Man to exterminate his enemies right out of the face of God's green earth. And from the looks of it, its a pretty-bad ass weapon. 

As Justin Hammer said in Iron Man 2: "it has the ability to bust the bunker under the bunker you just busted."  Yeah, that sums it up. 

Here's the cannon in action: 

I know what you're thinking. You wanna see this damn thing in the movies. While that might sound a very good idea and good looking on the screen, I don't think it will happen. 

Marvel Studios has the Iron Man franchise pegged on to "reality" - meaning, they're trying their very best to make it as realistic as possible. Can a superior tech like this help any future Iron Man film gig in doing that? 

I don't think so.

But then I may be wrong too. We might see this in Iron Man 3. What do you guys think?