What happens in this situation,Who wins?

[Pred]

Well it says that in the book this scenario was used for beginners and used to teach people how to play, that's why the advanced cards are left out.

and if you add in new things to the scenario like the advanced cards and grave dead deck for zombies with auto spawn, then 2 heroes is a breeze

on page 17 states

-They kill four (4) Heroes. (this includes turning heroes into zombies in the advanced game)

so that rule alone makes me think that if you add these advanced cards, making it an advanced game then I would think the scenario would change from 2 Heroes to 4 Heroes.

but that's me personally I've always played that scenario on 4 Hero rule