If they can comeback mentally confident, 99% without worry about the possibility of a reoccurring injury, I don’t see why not... the key being the amount of time and reps devoted post rehabilitation, or more specifically being able to throw kicks in practice with wreckless abandon, gaining back the trust within their own body/leg/mind. If they’ve been able to get to that point, they should be able to throw kicks during a fight with the same confidence as before the injury.
That being said, I think that Conrad has a higher probability of being able to bounce back, particularly due to age and lack of complications during the healing process.
The Chris, I’m not too sure about, TBH I wouldn’t be surprised if he comes back for one fight, looking extremely tentative in every aspect of the fight and calls it a career. I honestly hope I’m 100% wrong about that and Weidman comes back looking like he’s got a chance at stringing together a few wins for one last run at gold.