OTA's are out, but limited participation in training camp seems to be on the optimistic side of the spectrum.
Just don't rush things physically and get the mental part down NOW! It's not a 9 month vacation. Get to know all defensive responsibilities like you had to go into coaching. OLB, DE and even ILB as positions of focus. Learn the scheme and adjustments. Then if it takes you half of next season, so be it. You'll be ready to go when you are ready physically and mentally sharp enough to overcome any lingering effects physically.
I'm a patient fan. But optimizing his chances of as complete a recovery as probable is likely the prudent choice.
This is the way this and other injuries should've been handled from the beginning, instead of needlessly rushing players back to play at less than a % where they can contribute at an acceptable level. Think of how Brooks Reed was rushed back from his groin injury, performed poorly (Predictably) and because of the damage caused had to have a surgery that he is just now recovered from enough to perform at a high level.