Some thoughts on a few favorites ...
Sent Here For a Reason ... plays the same type of melody with the piano as the beginning of the trailer at points. Very alien sound as well. Likely one of those parts that shows up in various pieces, like in TDK trilogy films.
Goodbye My Son ... the sounds at the beginning were very Pan's Labyrinth sounding to me. The music following is really haunting. In general I love what he's going with for the seemingly Krypton scenes.
If You Love These People ... really like this sample, especially the end which seems to lead into the walmart app music. If the trailer music isn't a major part of the theme, I could see this being it.
Krypton's Last ... very eery feel to it. The prominent strings are not unusual I guess for Hans.
This Is Clark Kent ... again, the similar piano cue from the trailer, but slightly different take on it. So far it feels very Middle America aka Kansas ... can definitely see why it's called 'This Is Clark Kent'
What Are You Going to Do ... more piano ... that's got to be some sort of a Clark theme. It's reminiscent of the way I feel about 'Corynorhinus' from Batman Begins. My favorite Batman piece.
Flight ... builds early on towards bombastic feels near the end, definitely feels like it's moving towards that sound from the middle of the 3rd trailer. I sure hope so.
Not really a favorite, but 'Terraforming' almost has a Bane-esque cue towards the end.
Overall, it's a nice start. Can't wait to here the full songs.