With the recent addition of friends and giving items, also a new egg has been introduced: a 7km egg hatching new Pokemon (source). Who are these Pokemon exactly?
There are 4 different Alolan forms of Pokemon found right now that will hatch. All of them evolve one state further. These are:
Below is a picture of the different forms and evolutions
(I do not know the source of the picture, it was shared in our local telegram group)
Also, a couiple of days later, the Alolan Rattata form is also hatchable (apart from catchable in the wild).