The launch of Encore, the integration of code shares with the bookings systems(Westjets and their code share partners), and the continued development of the Vacations brand and integrating that in with Encore. Those together will be the story for the next 2 years. The last few months have shown an amazing transition at Westjet where growth in volume kept pace while growth in ASM's was let drop so that planes flew much fuller than previously setting records many of the months for load factor, and of course therefor, increasing the spread between RSM cost and RSM yeild. On a recent flight I heard that the jump seats in the cockpit were full as well as the flight!
I hope that in 3 or 4 years they can be anticipating the high efficiency Boeing or Airbus models that will just be taking orders then (Composite frames + high efficiency engines).