Could just be that he's sorted his action out. He seemed to have no idea what he was doing last time he was picked for England, and hence the ball was going all over the shop. He always had something about him, and he has had a brilliant season, and he'd certainly be a better option than GBH, so I wouldn't be too bothered if he was picked. It's only a 15 man squad though iirc, so it's not going to be easy for him to get in, you'd expect England to pick a spare opener, a spare quicky, a spare keeper and a spare middle order batsman, and if we presume that Onions will be in the XI, the spare quicky position will likely be between Harmison, Sidebottom and possibly Plunkett.