It all depends on how everything goes with his current legal problems. He's facing major jail time.
In September, he was arrested after a search of his residence yielded 262 Vicodin prescription pills, 180 Soma prescription pills, 555 milliliters of anabolic steroids, a residual amount of powder cocaine and items of drug paraphernalia. Hardy was charged with felony trafficking in opium, two counts of felony possession with intent to sell or deliver a Schedule III controlled substance, felony maintaining a dwelling to keep controlled substance, felony possession of cocaine and misdemeanor possession of drug paraphernalia.
So as far as when he's coming back to WWE, all I can say (based on those charges) is.....no time soon.