He has to get surgery, and he does not have a timeline for his return. In fact, he must see doctors first, who will then give him the scoop on what's going to work best for him. Needless to say, there are a lot of unknowns for Kane right now.
That might be hard for a lot of Oilers fans to hear right now. After all, we're sure they would love for their guy to be healthy. But as you know, this is hockey, and injuries are going to happen. Hopefully, he can recover and be the player fans have come to love.