He's clearly been behind them since end of last year when he got fit again. Look at the discussion in the other thread. Fans have selected four different players as preferred CM starters for Arsenal. None have chosen Wilshere. Clearly, he's lost.
I would not advise Juve, but if they have a gap for him in the inside wide midfield role that Pogba occupied, then it might be worthwhile. He should humble himself and go to a Watford. He needs minutes. Even Big Sam recognizes that. Sam who, btw, has picked bench-ridden Sturridge and Hart.