I searched for this topic and couldn't find it, i can't believe no one has opened a discussion on what a find a very interesting topic.
In October 2018 a new Assassins Creed, Call of Duty Black Ops, Battlefield and Red Dead Redemption will release in the same order in consecutive weeks. One or probably even tho of those games will suffer in sales as a result. My initial guess would be that Assassins Creed would suffer the most and Red Dead will be the bigger winner. But if I look closer, Assassins Creed will benefit from being the first, Battlefield V's feedback from the community has been very mixed and Call of Duty will sell strong no matter what (which BTW is completely inexplicable, the game is basically the same every year and so fucking basic).