Well there's talk of Alexis to Juventus, and there's talk of the Juventus coach to Arsenal. Is Alexis going to choose to play for Allegri at Juventus, but refuse to play for him at Arsenal because he isn't Wenger?
How many players have actually left a club because of a new coach arriving (and not just because the new coach wants rid of them)? Maybe 6-12 months into their reign if they don't get on with them or they're being dropped or the team is playing like shit, or maybe even straight away if they didn't have any respect for Eddie Howe or Gareth Southgate but if we were to bring in a proven coach and offer them good contracts and Ozil and Sanchez decided they wanted to leave then they would just be making excuses IMO.
And also what if he stays and they still decide to go? There was talk of them going and they weren't signing new deals long before Wenger was under this pressure. And what about the guys like Bellerin, Koscielny etc. who have signed deals already when these are players that genuinely owe a lot to Wenger for their careers, why are they happy to stay with Wenger's future up in the air? I just really doubt that our better players staying is genuinely tied to Wenger staying.