The Markman delay start is mostly to blame here. Should Judge Caspar Deny/Grant in part the MSJ a Markman date would also be forthcoming. Should she completely rule with ATVI then immediately Worlds would file for a new lawsuit and at worst would have infringement from the revised priority date. Keep in mind patent holders have 6 years from patent expiration to litigate damages. ATVI is just one, the primer lawsuit, to drive well over 50 other makers into litigation, and eventual settlement.