Maybe. But I'm sure they'll be someone willing to take Gibson.
Even if he does regain full fitness, he's just going to be out the team again.
We seen how jags and arteta struggled when coming back from an ACL, with Gibson it's going to be ten times worse.
We probably wouldent receive much money for him. But with Besic coming in I don't see much of a place for him in our squad.
Jags and Arteta were our main players for their respective positions, because of our squad size we didn't have the luxury to ease them back in, and it showed badly with their form. Luckily like you say we have a number of options for Gibsons position and he can be eased back and given time to get up to speed. There's no point in selling him now considering how much he'd bring in, he's worth persisting with considering he can be a good player when he's fit.
Also there's no saying how long it will take Besic to adapt to a new league, people are putting a lot of faith in him after only seeing a few games in the World Cup, but in reality he's a young player and he'll be making a big step up from the Hungarian league to a team with aspirations of a top 4-5 finish in the most competitive league in the world.