I don't doubt for a second that Radulov is returning because of two reasons. One is because the Preds seem like they are going to make the playoffs. The other reason is to get out of his NHL contract and get a new one that will pay him a boat load of cash (which believe me some GM's will do, after all look at Grabovski's 5.5 mil/yr deal).
It woul be nice to see him fall in love with Nashville and resign like Nabokov did with the Isles and I think the Preds believe that can happen, but only Radulov can predict that one.
Either way, welcome back Radulov and here is hoping you stick around this time instead of running away from your obligations!