Terry already has retired from internationals. Gerard, lampard, cole and probably Carrick will likely follow suit after the wc.
It's likely Barkley, wilshire, Townsend will all be in wc squad gaining experience (and wouldn't be surprised if maybe Morrison). Rooney will the old experienced pro in the squad.
We will need younger centre backs and strikers coming through, but at the moment there doesn't seem to be an abundance of them.