Not sure De Jong would be covering much ground right now, last we heard he was still out with a bad ankle injury and hadn't trained this whole summer. He's not going anywhere, much less signing for Arsenal.
Two ways I can see his situation working out. The first would be if Barca loaned him to a top club for half his wages.
The second would be De Jong agreeing to an amicable contract termination for a fraction of his owed wages. He should think about that if he can line up his future at an actual football club, as opposed to a "més que un club".