So an interesting situation came up today. Both Tom Riddle and Peter Pettigrew were in play. There are no control tokens on the current location. I have an ally in hand as well as a card that can remove control. Tom is going to make me discard a card. If I don't need to remove control, I would prefer to discard the card with that ability. However, if I do need to remove control, I may want to discard a different card instead or possibly suffer the health loss. With this in mind, I will want to resolve Wormtail's ability before resolving Tom's ability, but its not clear from the rulebook if I can decide what order to resolve the villains in or not.
I can similarly see a possible issue with Bellatrix. Her ability requires you to resolve an additional Dark Arts card. My assumption has been that you do this during step one, but it is not explicitly stated on the card. Even though Bellatrix's ability is not optional, the Dark Arts card you flip for her might give the heroes a choice. So again, the timing of her ability could change players' decisions.
In what order are villian cards resolved?
Villain abilities should be resolved left to right, so if Peter is to the left of Tom, you will need to reveal for Peter first, and then resolve Tom, and vice versa if the order is reversed.
With Bellatrix, you should just reveal an additional Dark Arks event when you are revealing for the Location.
Game Designer - USAopoly