Iron Maiden is a perfect fit but I only see Hollywood getting em as much as we deserve another music house, Murdy always get em as exclusives or something, same goes for us when we got Rob last year. As much as I would want Maiden, it's just not in the cards for them, the higher ups want hot ticket artists and Eillish is that right now, not saying Maiden isn't big but right now they haven't caught the eye of anyone at the moment, it's like Black Sabbath, Black Sabbath caught peoples' attention at the time when they reunited and made 13, it was hot at that time because the biggest heavy metal band in the world reunited and they had a lot of concept you could work with as a maze and Murdy capitalized on that, something that we should have had as well but again wasn't in the cards.
Also look at it from here, even if the house or show wasn't popular, they still made their money in getting their foot in the door in bringing her to the event and drawing more teens and people to the event as well. They'll still come out winning in some way at the end.
Plus if anything I'd put her in the MIB tent and wouldn't look back, save the other areas for the other properties and put Beetlejuice in Shrek