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Well, this one's already started, with Bacary Sagna's remarks to L'Equipe pored over with varying degrees of glee and dread.
But Sagna—invaluable as he has been, and his consistent excellence has been one of Arsenal's major overlooked strengths the past few years—is not really a big enough star to drive the press frenzy in the time-honoured manner of Vieira, Van Persie, Fabregas and Henry.
So who will it be? Like Sagna, Theo Walcott got his want-away story in too early in the season; plus, he still has yet to prove his potential on a consistent enough basis to qualify as a must-keep player.
So the answer is simple—Arsenal's next big star with one foot out the door will be whichever player has the most impact this season.
It could even be one of the new boys. After all, RVP only delivered one complete, injury-free season in eight years, and that was enough to convince him he was too good for the club.