I cant recall I have read this, but I guess there are some guidlines so please forgive me for asking...
During the heroes turn, a hero kills one of the unactivated heroes. Will the killed hero be able to activate during that turn, now being with full health and full fatigue?
Yes, of course.
Moneseki said:
During the heroes turn, a hero kills one of the unactivated heroes. Will the killed hero be able to activate during that turn, now being with full health and full fatigue?
Yes, he will. The OL will also take his CT for the hero's death just like usual, so there's nothing dirty or underhanded going on here. The hero who did the killing just saved the OL from spending a monster attack to do the same thing.
In the gold level of RTL we thought of using the rule that if a player kills another player willingly then the OL CAN refuse to get the CT. Hence preventing the force of a final fight in a single dungeon. Ofcourse we never intended of doing that and i got that idea by reading the forum (that you can actually do something as stupid and shamefull as that cause winning is everything i guess and fun comes next) but it is an easy way of preventing idiots from themselves and ruining a nice campaign.