Accidentally sent the next mission off without screenshotting. Three slot mission to teach you how to use expendable troops.
And now we wait four hours...
Current Followers. Non-obtained can be seen, but I'm not going to link them all, this is just an example.
Grey abilities unlock upon leveling the followers rarity.
Edit:
There are a total of 8 listed unique followers and they are all Vrykul/Titan Watcher, excepting one Dwarf. RIP player-race Warriors.
And the Combat Ally option.