or are those titans going to leave?
Yes, as Gerter already mentioned, the titans will give a quest.
Added 2 minutes later
it would be good to clarify this and some other things
a Necropolis can reach a Castle if it was captured by a player. As for its strange behavior, it's hard to say; Necropolis AI doesn't have any specific instructions for behavior, so it's just inexplicable AI stupidity.
Пробуждение зла
Нашествие из Преисподней
Смена эпох
Скачать все кампании одним архивом: Яндекс.Диск Google.Диск
You can download the set of 3 Campaigns (English version) here
Одиночные сценарии Heroes V 3.1:
Незваные гости
Красный кристалл
Синий кристалл
Закат тьмы
Мультиплеерные карты для Heroes V 3.1:
Легендарная война
Сердце вулкана
Передел мира