That freeze frame pic doesn't look good. It's really too soon to tell how long we're talking, or even what the injury specifically is. There could be ligament damage, there may not be. Early reports could be dislocation, x-rays may show a break. There's just no way of knowing right now.
Can't forget about this past season with his ankle injury. How many games did he miss with that? My memory is fuzzy on it, but I remember being very pleasantly surprised, especially considering he was on the ground for several minutes when it happened and even got taken off the court on a stretcher.