Kinda interesting, I think. I like the idea of a guy joining the construction of the Transcontinental Railroad as a means of finding his wife's killers. The show looks like it's taking a pretty realistic approach to portraying Manifest Destiny as it actually was, and not the jingoistic banter I've gotten from some of the history textbooks I've had to study. I think the majority of what a saw looks promising.
However, there's one big thing that's nagging at me. The parts of the trailer showing people talking about how dangerous the building of the railroad will be and how "blood will be spilled," with cuts of explosions in between, is making me nervous. I realize it could just be terrible editing for the sake of making a trailer, but in the event it's not, I think that could ruin the show for me. I'm aware that any construction work back in those times was dangerous work, building a railroad particularly so, but I got a somewhat different vibe from those scenes, like the workers had to constantly be on their guard from attacks. Maybe it's just me, but that seems like just too much.
I hope I'm overthinking things, because if the show is made as historically accurate as possible while still following the soldier's story the whole time, I think it could turn out pretty good.