Alolan Raichu is now a thing, does make having other Gens with Alolan forms a bit less unlikely in my eyes now, which would be a shame but meh, future games will give stuff to other gens.
Didn't see much from Alolan Meowth, so hard to say what will happen with it. Pay Day isn't much of a strong move as is, so no real indication if it'll have strong Attack or Special Attack.
Alolan Marowak also didn't show much since it used Will-o-Wisp, but it's suppose to have Lighting Rod still, so I hope it will be a Special Attack to make more use of it.
Alolan Raichu gains Psychic type, which I think could support my theory for certain types being given to some Pokemon. It's Ability doubles its Speed in Electric Terrain apparently? Probably has high Speed as is so this could be nice. It has 81 HP at level 30, not sure if that's around the normal for regular Raichu, probably doesn't tell much though. I like the surfing theme for it, it looks nice overall to me.