It's fair to be skeptical of how the game will turn out -- doubly-so given the way The Order, another Sony first-party game, turned out. It was another game where the 2 second gameplay trailers had you questioning what was up with the game. However, I think we've seen and heard way more about Horizon than The Order, Mass Effect, and a lot of other 2017 games.
The devs and marketing could be silent for a huge number of reasons. The game could be delayed (very likely considering the publisher), the second half of the game could reveal something big about the story of the game, the quality of the game is high enough that the devs are confident they don't need to show everything, talking a lot about Horizon right now could hurt whatever sales potential RIGS has, the Horizon pre-orders could be looking good enough that they don't need another big content blowout, the content blowout could be timed for a week or two after the Switch reveal, etc. There are a million and one reasons why the devs could be quiet right now, and the only way we'll know what's up is in a few weeks.
Do remember that disappointment is a result of expectations meeting reality. If you're going into Horizon expecting The Witcher 4: Geralt Got A New 'Do, you're going to be disappointed. Guerrilla aren't making that type of game. If you're going into Horizon expecting a western RPG with a different twist, your chances of disappointment are going to be much lower. I will say this though: no matter how the gameplay turns out, the one thing that's not going to disappoint is the presentation. Those graphics look i-n-c-r-e-d-i-b-l-e.
