My girlfriend bought me Marvel Ultimate Alliance 2.
Awesome girlfriend.

I hope you enjoy it.
I found out later that the pre-ordered version came with Juggernaut. Did anyone here get it?
I did. I might have waited a while and got it cheaper though have had I known that they would later offer the playable Juggs as a download. Being the big Juggernaut freak I am, so I just couldn't resist the preorder.
As for the download, unfortunately they discontinued it on December 31, due to it being a "limited-time offer". So sorry, you can't get him.
My group has Hulk, Thor, Wolverine, and Ms. Marvel.
Nice group. It would be hard to try not to include Wolverine. He's just awesome.
I just wish I could have had Thor, Hulk, and Juggernaut on the same team. What were Juggernaut's moves?
Well, you aren't missing too much. MUA2's Juggernaut was a disappointment compared to XML2's version. Powers:
Ramming Dash - Similar to moves that Cap and Thing have (think a very brief Bullrush), except with Juggs hitting enemies and such won't stop him.
Drop Smash - Like it sounds. Jump up and slam down.
Cyttorak Spin - Like it sounds, he spins around damaging enemies (range isn't very far).
Earth Shaker - A stomp that causes a forward moving shockwave, good range.
Here's an image of Juggernaut from the game:
And his alternate costume (Ultimate Juggernaut):
BTW, there's a DLC download that contains new Sim Missions and 5 new playable characters: Carnage, Magneto, Psylocke, Cable, and Black Panther.
My copy had a code to unlock the Hulk but the code never seemed to work.
You have the means to unlock him right there in the game anyway, no need for the code. Just some patience. I always found it silly that they would offer such a code as an incentive to pre-order. You don't get anything that isn't already available in the game, you just get convenience. The did a similar offer for the first Ultimate Alliance with Silver Surfer code.