Wasn't he actually going bald, so shaved anyway? So I doubt he would be able to grow his hair while he was away. Wearing the wig over his bald head would make more sense, and go with the masked look better.
Hell, Chavo went bald and somehow got his hair back so why couldn't Kane do the same?
Im sure Kane will come back with the mask they made it almost obvious from the last promo they did of him on RAW i dont know how effective it will be but it will be good to see him back with the mask once again and going back to the monster he once was and for the people who dont think Kane is returning with the mask i can understand their point of view also because WWE are known playing with peoples heads and messing things up in the end.
When does everybody think he's returning? How many believe he'll be back masked?
Imagine if this happened: Mark Henry and Big Show fight a brutal match but Henry retains. Kane returns shortly after and destroys Mark Henry. Then he leaves and Daniel Bryan cashes in. Sounds alright huh?
I think/hope he will return at TLC and destroy the world title particepants. He will probably come back at RR as a surprise entrant, eliminate 5-8 superstars and get eliminiated by someone who he fill feud with until WM. That's what WWE usually do with Kane.