I have a thought as to why KANE changed his persona at RAW. He has no match at Summerslam 2014 and with the mask that might look strange since he is the Corporation, so making him his old persona saves him from having a match. Ofcourse he may still be a lumberjack.

I am quite surprised he is not in a match at Summerslam. Especially since the high profile he has had over the last few months.