After reading both the newest 1.5 rulebook aswell as the 1.6 FAQ, i found something confusing.
The book says that the timeout effect pulls the denizens to the boss and remove any status effects and hearts.
The FAQ says they keep it.
What is the right answer?
The FAQ would be wrong on this one. The models are completely healed when moved.
The reason being that if you had the extra models, they would be at full health, but if you didn't and had to move models already on the board, then they wouldn't be at full health. And that doesn't make sense.
So go with the fully heal option.