(…) Guerrilla Games says it still has plenty of content in the pipeline for that PlayStation series. Speaking at Develop: Brighton, studio director Jan-Bart van Beek said that Guerrilla has around “16 plans” in development for the franchise.
“We’re going to be continuing it for a very long while,” van Beek said (via GamesRadar). “As people probably already know, we’re also going to be working on a multiplayer game.”
Machine strike was great as a side quest but I agree with you for most of the others. Although Horizon is clearly good at side quests, I still think the main story is what matters.