I think there's more money in Taker verses Lesnar than Taker verses Cena. The only downside is Lesnar would probably hurt the guy and cause it to be his last match, whereas Cena would work a match that would be safe enough to allow another match (from Taker) the next year.
01/18 & 01/19 -- Godspeed You! Black Emperor and Neurosis (in Montreal)
02/08 -- Dark Tranquility
04/11 -- Black Sabbath
04/24 -- Nile