That's true, but if it's a huge hit, it could eventually end up on Broadway.
This just made me think that, if someone recorded every single thing that comes out of my mouth, it would be easy to find me contradicting something I said a year ago - let alone 5 years ago. People do change their feelings about things, and this probably wasn't presented as "Let's do a Broadway show." Also, reading some of the additional articles that have been posted, I think it took some time to talk the band into this, but they were so impressed with this director that they decided he could give it a shot.
Just my 2 cents...