Anyway in answer to the original post -- he hasn't vanished. He's not in the England squad and why on earth would you play him in the tin-pot cup?
If he's still not in the squad past Wednesday having not played any rugby for three weeks I'd expect to see him in the quarters against Falcons.
If the table is anything to go by we should be trying to get as many points as possible that week and the following week at Worcs.