By Foo Yun Chee BRUSSELS (Reuters) – EU antitrust regulators are asking games developers whether Microsoft will be incentivised to block rivals’ access to “Call of Duty” maker Activision Blizzard’s best-selling games, according to an EU document seen by Reuters. EU antitrust regulators are due to make a preliminary decision by Nov. 8 on whether to clear Microsoft’s proposed $69 billion acquisition of Activision. The EU competition enforcer also asked if Activision’s trove of user data would give the U.S. software giant a competitive advantage in the development, publishing and distribution of …