There didn't appear to be any seriously damaging, or unnatural motion. It very well could just be a strain as anything in the knee area can be quite painful at first but relatively harmless after a few days of retraining. I think it's best to stay optimistic about his speedy recovery until the tests are complete and we find out what is really going on tomorrow. I'm sure he's got a lot of swelling right now which makes it very difficult to accurately assess the damages. With the knee it doesn't take much damage to have to limp off the ice like that. The good news is if it was a torn ligament there would be almost no way he would have stood up on his own accord like he did, and so quickly.
You know, from Marlies Scrivens is not bad goalie. He just need to settle in a bit and stop overplaying the puck. I'm confident we can be above .500 team with him in net assuming team plays the same as recently found character one.