Found this little snippet. So it appears we won't see Locke/Cooper for a while.
Now that Locke has blown up the submarine, it seems all of the castaways will have plenty of time for introspection. And fans will have lots of time to ponder. It will be five weeks before viewers see Locke and his father again, but when they do, the results will be an intense set-up for the season's climax, Lindelof said.