"For [the first mission], Luis Lopez, the main character, had to take control of a new helicopter, armed with a machine gun and RPG launcher. Players then must destroy a yacht and several smaller boats. The other involves Luis jumping out of a helicopter and parachuting on top of a nearby building ready to be infiltrated. Players were also given a variety of new weapons, including a smaller, automatic rifle, a turret-size machine gun, and satchel charges."
We've already seen the Little Bird-style chopper, the yacht, and the parachuting in the screenshots posted yesterday and earlier in the week, so this pretty much confirms what we can expect. Hopefully we'll see even more when the trailer comes out; remember, it hits this Tuesday!
[Source: IGN, props to Massacre for posting in our forums]