It'll be the first game of the 2015 preseason.
The Philadelphia Flyers will host the New York Islanders in a preseason game at Allentown's PPL Center, home of the Lehigh Valley Phantoms, on Monday, September 21. Tickets are on sale beginning today.
That evening the Flyers will send one squad to Allentown and another to Brooklyn's Barclays Center for the first NHL game at the arena as the Isles' official, permanent home. The split-squad affair will open the preseason for both teams, and since it's a split squad, you can probably expect a decent amount NHL-caliber players in both games.