On paper, most analysts will agree that Activision Blizzard, Inc. is enjoying a solid start to this year. Against the January opener, ATVI stock has gained nearly 9%. Given that the year is still relatively young, this consistently hot performer has enough time to make up some ground. Yet trouble is looming over the horizon for ATVI. Despite Activision’s immense reputation in delivering the most compelling first-person shooter games, another company has unexpectedly taken its throne.SourceSeems like upside starts to lose it's force. $ATVI, Activision Blizzard, Inc / D