Source: WWE
WWE.com has posted an article stating that Kane was injured at the hands of the Wyatt Family on last night's episode of RAW. The story noted that Kane was stretchered from ringside and his cervical spine was immobilized with a cervical collar.
WWE physician Dr. Chris Amann said that Kane was coherent in the ambulance, but that they are concerned that he may have suffered "any sort of brain or cervical spine trauma that may be significant enough to either warrant surgery, or an extended period of time away from the ring."
The article noted that Kane's status for this Sunday's WWE Money In The Bank pay-per-view was unknown, and that they would provide further updates.
While the article is clearly storyline, it does appear that the company is building to a Wyatt Family - Kane match for SummerSlam. As noted earlier, F4WOnline.com reported that The Undertaker may not be able to team with Kane at the event because he was injured during his last televised angle with The Shield.