Blade, I had the same experience with Mercs 2. I mean, it wasn't a blockbuster, but surely it was not mediocre.
The game looks awesome, but I have a feeling Gamespot is going to give it a bad review. They're giving all the good games bad reviews these days. Mercenaries 2 is not a 5 out of 10 average game!
The game should start at a small town where you and your buddies get messed up and the monsters break out and then go to New York & London, where you later get 'revenge' all that good stuff.