Britain's competition regulator, the Competition and Markets Authority (CMA), in April became the first major regulator to block the acquisition of the "Call of Duty" maker, citing concerns about the impact on competition in cloud gaming.
The U.S. Federal Trade Commission (FTC) has also opposed the tie-up, but suffered a major defeat last week when a federal court rejected the FTC's application to temporarily halt the deal.
Companies cannot offer remedies after its publication and their only recourse is to the Competition Appeal Tribunal (CAT).
But last week, less than an hour after a U.S. federal court ruled the deal could go ahead, the CMA said it could look again at a modified proposal.
The judge also asked whether the FTC's initial defeat in the U.S. had been taken into consideration by the CMA.
Persons:
Marcus Smith, Sam Tobin, Josie Kao
Organizations:
Microsoft, Monday, Activision Blizzard, Markets Authority, U.S . Federal Trade Commission, CMA, CAT, Thomson
Locations:
London, Britain, U.S