On one hand, I'm anxious because it's an open world. They tend to really fall short in a certain aspect. Sometimes they're a joy mechanically, like MGSV, but the world itself is boring, the writing is weak, and the side quests are of the "Destroy tank unit #9th". Sometimes it's a lot of busy work with the map littered with icons that represent monotonous activities, like in Ubisoft games. Bethesda makes really cool sites and it's fun to explore, but the writing is really bad as are the quests. TW3 had great side content and characters but combat didn't develop enough and I would've liked it if the world had more cool, hidden stuff to find (large dungeons for example).
I'm not familiar with GG. Not experiencing their previous games myself leaves me unsure what to expect of Horizon. It being their first open world makes me a bit nervous, especially when the marketing makes this game to have it all - great combat, great graphics, great world, cool dungeons, and supposedly the writing and story are interesting too. But there was a post from another thread (don't remember where) a few days ago that said something I agree with - companies sometimes have that one game that really propels them. GTA 3, Uncharted 2, Morrowind, TW3. Maybe Horizon is that for GG, and maybe it really will deliver on so many fronts. Basically it seems to be a bit too good, so I'm really curious about the reviews. The embargo on reviews lifts a few days before release, right? That's a sign of confidence and just inflates my expectations further.