If this is true, then the suits at ABC, in a move uncharacteristic for their breed, are being smart and not greedy. As has been said many times before, giving the Lost creators a firm end-game will allow them to do a much better job of structuring the large story they're telling, and of determining when it would be most appropriate to provide certain answers. And five seasons strikes me as a fair run for the show, and gives them more than enough time to finish telling their story. We had heard a while back that the producers wanted this, and that ABC might have been amenable to the idea. If the E! report is right, then this would be the natural end result of these rumors. Excellent news, and I hope we hear it confirmed soon.