If Moyes is expected to be a competent United manager then dealing with this sort of issue will have to be well within his ability.
And he has done exactly that so far. Official sound bites coming from the club illustrate a manager in complete control of this situation and who might I add appears to have adopted the best interests of the club in :
1) Refusing to cede to the player's apparent demands for a transfer
2) Outlined his own vision of the role he expects the player to play in the coming season
3) Not letting one player distract the team's preparations for the forthcoming season by keeping him as far away as possible from the team's pre-season games through a combination of various pretexts and specially arranged matches in which when the said player has participated, have largely been low profile and behind closed doors. This has been crucial in not stocking the media circus around the player which may have otherwise engulfed our preparations.
4) Made it abundantly clear of the existence of a contract between the club and the player thus implicitly reiterating the value of such contract and other terms involved. This has in return limited the player's options to hiding behind the back of heresy proliferated largely by his advisers rather than the player mouthing off himself.
5) In doing the above, Moyes has made it clear to Rooney, his advisers and Chelsea of the club's reluctance to entertain a transfer unless it feels comfortable in doing so. This has been evident in the swift manner with which we have moved to reject their bids clearly stating our position and/or valuation of the player and above all showing who actually calls the shots in this scenario.
The bottom line is, the club continues to retain the luxury of dictating the terms of engagement in this whole saga and the player is probably aware of that, hence the hesitancy to come forward himself. United can afford NOT selling and can even opt for Di Canio-esques tactics in disciplining the player should he step out of line and NOT abide by his contract.
My take is that eventually, the injury excuses will run their course and the club will soon cease to protect the player and demand some kind of return from his employment here and in the event he fails to produce what is required of him, then Moyes may either ship him out or make his life a misery in ways Rooney has probably never imagined.