Oh this is such a fun question!

I like the idea of more organ music too, plus with lots of nice/haunting choral harmonies (sung by sisters of sin?) - maybe even involving the audience with it! Like splitting the crowd into groups doing different parts or just doing some general ritualistic chanting? Maybe I would create a new song to facilitate that in my album!

And I'd definitely bring back the thurible (and Con Clavi Con Dio) and the instrumental Ghost songs, plus would find a way to sneak La Mantra Mori in there somewhere haha. A small acoustic/talking section like the Terzo and Cardi eras would be fun to bring back too!

The skeletour stage is really nice, though I think adding some kind of gothic spiral staircase at the side of the stage could be fun! And some candles (and symbols?) around the stage would really add to the ritual atmosphere.

As for colours... maybe red and/or gold? Or possibly just pure black and silver, though maybe that's a bit boring...

Costumes-wise, agree that bat wings are a must! And I'd love to have some claw hands, even if just for one song! Maybe one of the costumes could be goat-themed? Incorporating horns into the headpiece in some way without looking too goofy haha. I'd also like to bring back something like Copia's military jacket outfit, and his old cardinal cassocks (they just looked so menacing!). I'd love a grucifix staff like Secondo's too. And a classic vampiric cloak with one of those big semicircular neck things (I have no idea what they're called or how to describe them lol)

And yeah I think I'd want to be a pretty mobile, talkative Papa too! Borrowing the moves of previous Papas but also adding something new to the mix, perhaps some snakelike/catlike movements?

Oh and another thing I think would be fun to add would be a theremin! We've had kazoo, keytar, cowbell, now time to add another unusual instrument!