First before I give my thoughts on all the news I thought I would point this out in case it hasn't been already, but if you look at this picture you can see that the tauros the trainer is riding in the picture is completely different color from a regular tauros. I'm not sure this was spotted yet. Now for my thoughts:
Gumshoos: This looks like a great evo for yungoos, it provides a lot of bulk it looks like but enough for it to be big and take down pokemon. I can't wait to see the stats on this pokemon.
Mudbray: I am happy Mudsdale has pre-evolution form and now I know this guy is definitely going to be on my teqams first run through of the games and I am excited to try him out since X/Y really leaked ground types.
Minior: I am not sure with my thoughts on this pokemon, I mean its an interesting design with interesting forms, but Rockruff will be my main rock type.
Fomantis and Lurantis: My first playthrough I am starting with rowlet, but this line I will use in my Sun game for the grass type it is an interesting grass line, sort surprised this isn't part bug but oh well I am still using it.
Oricorio: Now this is one interesting pokemon having four different types for each island. Out of the four styles I am first gonna try the ghost version and then the fire version since those two designs are my favorite.
Alolan Pokemon: First this is such an awesome idea for bringing back older pokemon and changing their stats up. I cannot wait to see which older pokemon have received new forms because this is such a game changer in my opinion.
Alolan Sandshrew and Sandslash: First please just change the names to snowshrew and snowslash lmao. But these are my favorite not only on types but also bringing back one of my old favorites and turning it into an interesting design, based on its description I can see it being more defensive possibly with a good attack stat.
Alolan Vulpix and Ninetales: The design that caught me most off guard but I am definitely liking the design and type to go with it. My question is how it will now evolve since I doubt a fire stone will work here.
Alolan Exeggutor: Honestly this design doesn't surprise me at all, plus it goes very nice with this region. The only odd thing for me is the whole dragon typing since I'm not sure I see it, but still that's a great design.