That looks great.
Do you need to have played the first one to get the single player story?
I might be mistaken but if i remember right the story is seperate.
The only complaint i have with crysis 2 at the moment is the aim down sights speed, it slows it down ALOT from hip fire, if they reduced the slow down by about 30-50% it would be spot on.
The kill streaks have a nice change and acctualy work against campers, you have to kill them then run over there body to pick up the dog tag they drop for that kill to count to your kill streak, if your team mate dies next to you, take cover and wait for the guy coming to collect his dog tag and take him by supries.
They work nicely, not over powered or under powered, 3 is bassicaly a black bird from black ops (all ways on uav for like 30 sec), 5 is a sort of air strike with a twist, IT A GOD DAMN ORBITAL ION CANNON! and 7 is basicaly a chopper, not acctualy sure how well they do as i never pay attention when mines up.
A very nice looking game aswell, just hope some of the maps are a bigger than the rooftop one.