After the success of the "Best Riven NA" tournament, Leaguepedia has decided to host a similar tournament for Lee Sin.
Leading the charge and becoming victorious in the Best Riven NA tournament was MegaZero, former top laner for team MRN and current top laner for Complexity. After the success the previous tournament held, Leaguepedia felt the best champion to do the next tournament on would be none other than Lee Sin, a champion with a nearly unforseeable mechanical skill cap.
Although the dates are not yet known, Leaguepedia will be trying to make this a consistent tournament where players can test their mights in both 1v1 and 2v2 for a variety of characters, including the utilization of the future "Magma Chamber" map when it becomes released.
?Source - Leaguepedia