I think that all the lights should go off following by the Undertaker's vintage blue lights near the entrance way showing a sign on the Titan Tron like "Rest In Peace". This would be enough to distract Kane which would allow him to be eliminated in the process. This would be much like the promos the WWE had for Kane back in 2002, "The Fire Still Burns".
They should keep showing creepy promos with Taker talking on the Titan Tron at Every Raw, before Wrestlemania XX, where he challenges Kane for a match. Undertaker should finally make his return at Wrestlemania XX. I think it would be a good idea because It would allow Taker to grow his hair back to as long as it was back in 1996-2001, and it would make it make people watch Wrestlemania to find out what Taker's going to look like when he returns to destroy Kane.