The real truth of things would appear to be that Mats Sundin may indeed be leaning towards retirement. With all the press coverage on his situation the last word that I heard was that he still had not begun skating in August. For any NHLer, let alone a 37 year old, not hitting the ice going into the Labor Day weekend is surely considered as a bad sign. A player coming off an injury/surgery might get away with it, but not a guy looking to stay on top of his game. With this in mind, I'd expect that Thursday would be a reasonable indicator. If Mats hasn't started working out by then - and I'd be shocked if such news wasn't reported in every corner of the hockey world - then I'd expect odds to heavily favor Sundin skipping NHL training camps this fall.
We may have an answer that a lot of fans don't want to hear, but this week is certainly going to tell us a great deal about the big swede's upcoming season.