Hitman 4 will be a thing but not for a while

With no release date yet for Hitman’s planned co-op mode, it may be a long time until IO Interactive announces Hitman 4.
MP1st

Hitman 3 Eminem Collab Update Now Live via Patch 1.34/1.037

Hitman 3 x Eminem content update is live on December 1 via download 1.34/1.037 and this brings Slim Shady into the game.
Rock Paper Shotgun

Of course Hitman 4's coming, say devs IO, as they lay groundwork for a Diana Burnwood/Eminem buddy cop flick

IO Interactive CEO Hakan Abrak has made clear a new Hitman game will be coming at some point, while his colleagues compare ...

As ‘Hitman’ Turns 25, IO Interactive CEO Talks Eminem-Slim Shady Collab, ‘007 First Light’ Inspiration and Future of the Video Game Franchise: ‘Of Course There’s ...

IO Interactive has had some big things to celebrate this fall, including the 25th anniversary of its "Hitman" franchise.

IO Interactive says that, once Bond is out of the way, hell yeah we're getting back to the good stuff: 'Of course there's going to be a next Hitman'

Also speaking in the interview is lead level designer Jacob Mikkelsen, who in an admirable move goes to bat for Hitman: ...
Gameranx

Hitman 4 Will Happen According To IO Interactive CEO

IO Interactive has a few things in the works at the moment, but I don't think that they are going to bring out a Hitman 4.
Sportskeeda

Hitman World of Assassination x Slim Shady walkthrough: How to complete The Antithesis (Kill using Marshall)

While there are multiple approaches you can take to eliminate Slim Shady in Hitman World of Assassination's The Antithesis, ...