Might as well get this nipped in the bud, but as it has been noted on the Discord, Call of Duty 2019 will share the name of the fourth. This brings up some slight issues with how we have named things, Primarily the Template:Game and how the shortcut works for COD4. As such, We might as well ponder a solution until we either get confirmation that it is or isn't idiotically named. Twig (Talk) 03:04, May 25, 2019 (UTC)
Discussion
Thankfully the name has at least one differing characteristic - the lack of the "4". Anything that requires "mw" currently as an identifier could then just be changed to "cod4" or just "4" (like the {{game}} template}}, with the 2019 game using the "mw" tag. Prof. Sugarcube (talk) 03:24, May 25, 2019 (UTC)
Fortunately, some degree of prescience existed years ago, as many of our templates are named "CoD10 Weapons" and so on... so these are no problem. However for anything that is referred to as "mw" in templates, we should change that to "cod4". If we don't want to go and change things, we could just use "codmw" or something along those lines. If I think of any better ideas I'll post them here... 
03:58, May 25, 2019 (UTC)