Just one other thing on Hotton, he did his knee at training, just simply making a change of direction. A complete rupture. Not partial. That's not good.
As someone who has done 2 ACL's and had countless surgeries, MRI's, consults -all with the big name AFL surgeons and with my doctor as well who is a 12 year head doctor at a large AFL club (and sat in on some of my surgeries) - I can tell you that doing your knee that way is a worse way than getting a knock or someone falling across your leg. The reason being that suspicions start to rise that there is some sort of natural laxity in the joint v a blunt force causing the injury ie unlucky.
And I use the word "suspicions" because surgeons ultimately can not tell. MRI's and scopes will only look at the structure of things. You can't test or investigate for full load stress through your knee in the operating theatre or in the surgeons office. Only the individual themselves can do that, and even then, it's got to be over time and with repetition.
Every surgeon or specialist will tell you they did a perfect job and that structurally everything looks great. But not one of them will guarantee that you won't do it again or even that you are of minimal risk of doing it again. In fact, just 12 months ago my current surgeon (guy who is seen as the man by AFL clubs currently) said the knee is very complex and vague in many respects. Even MRI's only pick up structurally complete evaluations about 80% of the time. I've been victim of that - endless MRI's that show nothing, only to have a scope that pulls out multiple bone and cartilage fragments.
The good news for Hotton though, is that he did not damage his MCL or meniscus. That's good. Also good (perhaps) is that his revision surgery was for removal of excess scar tissue which indicates solid healing. Again, I've had that same excess scar tissue removed. It's a painful annoyance, but good in the sense of healed repair work.
But nobody...nobody... should expect any specialist can guarantee or even say that there's little chance of further issues. They can only talk to the structure of things.