Well, given that he needs entry clearance to enter the country I doubt he'll be training with us! Think about it!
Of course, if the Tier 2 part is approved quickly then it's well within the powers of the ECO to deal with entry clearance expediently and you would hope the club's lawyers would push pressure on the consulate to do so.
I have to say that given the amount of time Aurier has been in France you'd think PSG or an earlier club would've encouraged him to apply for French naturalisation, which would have removed the need for a visa (albeit the conviction would still be a problem until overturned).