The Troll warband is separate from the Night Goblin warband. The Night Goblin warband will feature 9 models (so perhaps the squigs are summoned or must start adjacent to a goblin or something). The Tzeentch warband will have a blue horror which turns into two red horrors. Whatever happened to pink horrors turning into two blue horrors?
Well I predicted random movement for him. The squigs deploy on non deployment, non blocked, non lethal hexes adjacent to the squig handler and they both become inspired if the squig handle dies.
In case you're wondering what Scurry is, it's on the Leader's card so I'll include that down at the bottom as well. ALL the goblins seem to get Scurry so watch out. They might almost be as fast as Skaven at this rate (but via a very different mechanic) .