Since "Jedi 2" was launched on Xbox, there has been speculation that more first-party PS games will be launched on Xbox.While Sony has denied these rumors, it does seem to have more porting plans.
Recently, foreign media TechGamer found that if you search for "Horizon Zero Dawn Xbox", you will get a link to the Xbox version. After clicking, it will lead to the German Xbox page, but the requested page will be unavailable.
Interestingly, something similar happened before "Jedi 2" landed on Xbox, suggesting that the next SIE game to be logged on to Xbox is most likely to be "Horizon: Dawn of Zero".