The battle rages on between Battlefield 1 and Call of Duty fans. While the former is enjoying renewed popularity nowadays, the latter seemed to be hurtling into deep space, like its setting. This might also be the reason why Battlefield is enjoying success: people welcome the realism of the game and be part of that historic event even if it were just a game. Thus, it is just logical that Activision will go with the trend and listen to its fans.
However, observers say that it might changed soon based on how Activision develops its games. The game developer has a habit of using a three-year cycle in developing their games. When the time comes for a new Call of Duty, it has already gathered all the information it needed and head towards the direction its fans are clamoring instead of staying in deep space and in the future.
In fact, there are already rumors circulating that the game company has chosen to collaborate with Sledgehammer Games in developing a Vietnam War-inspired game. Fans are speculating that it could use what it had already started with Fog of War, the game it abandoned a few years back.
Another setting that the developer can use for the next Call of Duty would be World War II. This is one of the best direction to go to said some gaming experts since Battlefield 1 has already used World War 1 as their setting. It could be similar but the rules and technology used in combat between the two wars are vastly different. It will also be interesting to see how Activision will treat Call of Duty if it will choose such setting.
These are just possibilities and speculations but fans are hoping that the game developer will listen to the fans and finally deliver something that will renew the interest to the Call of Duty franchise.