According to the website siliconera.com, voice recording for Call of Duty 10 has already begun. Apparently the game takes place in the Modern Warfare series and the main character is a "battle hardened veteran in his mid-thirties with a nihilistic point of view" called 'Ben Burke'. One apparent mission is a flashback which takes place in Somalia with John "Soap" MacTavish. Below you can see other lines that were leaked:
"Reminds you of Phuket, doesn’t it? Only this time the dust gives you cancer… OK, park yourself and get ready. When this thing kicks off, put a hole in anything that moves."
"This is Sentinel Zero One, successful crypto change on C2 net break, requesting immediate update of blue force picture and status of artillery, over. I have you broken and unreadable, I say again, requesting updates to friendly positions and status of arty support. Do you read, over?"
"We’ve got KVA on the move! They’re going to strongpoint the main gate, ETA two mikes! We’re providing support for our heavy rollers! Ready up and let’s move!"
"Goliath, this is Sentinel Zero One! We have enemy armor at the gate, hundred meters north of our position! Requesting close-air grid mark three-one-six!"