I don't know that an offensive star on the order of a McDavid wouldn't wind up making NJ a marketable item to the NY media for the first time in its history. For better or worse, NY's media loves a winner and loves offense. The last time a non-Ranger metro area team had an offensive player that marketable his name was Mike Bossy and you better believe the Islanders had support from the media in those days.
Tavares is a top ten forward in the league and he gets nothing in terms of local and leaguewide marketing. NJ had a top goalie of all time who had a 15 year prime and they got nothing locally. Lundqvist gets more now than Marty ever did and Brodeur is an all timer.