The Horizon series have always been announced at the E3 or Summer Game Fest events with a release in September/October.So, the 2025 Developer Direct came and went and no hint of a new FH, and the major release for Xbox is Doom the Dark Ages on May 15. If they do announce anything this year, the next FH will probably launch in 2026.
I don't think it means anything that nothing was shown yesterday.
I think FH6 will release this year. They might delay it a month or 2 when the GTA6 release date gets announced.
