For the time being, the only real raison d'être of this factory is the CL-515 water bomber, the latest iteration of the CL-215. It never was a de Havilland Canada product and was designed and manufactured by Canadair in Montreal, funded by the province of Québec.
The CL-515 is launched thanks to European orders, largely funded by the EU. The name Canadair became a common name for water bomber in many European countries. Whether or not Longview can use it will be interesting.
The Twin Otter might be revived, this is however much more uncertain for the Q400. Major evolutions would be required to challenge ATR and eventually the various green entrants on that segment of the market.