Does your religion have lightsabers? Nope? Didn't think so.
"A person is smart. People are dumb, panicky dangerous animals." Agent K. Oh my what he would think of people had he known about what the internet would become.....
Well in the original hero quest, the game master is more like a referee than a player that wants to win.
From what I understood, the expansion seemed like each player now had objectives to win.
Which made me wonder if heroscape system could not be used with the heroquest land scape where each player has a team of characters facing each other in the dungeon.
An option could be that one player could have access to the map layout and could make some rooms appear on the board to spawn the content of the room on the board and have mini to play with.
It sounds like you want a game like Descent: Journeys in the Dark (specifically first edition.. I hate second) or Star Wars: Imperial Assault,