GhostofCain
Ancient Mariner
If I were a billionaire I'd buy up the Maiden company, destroy all original tapes and copies, take down all songs from streaming services. I'd have the band re-record all albums with Blaze on vocals (he'd have to be sleepy and hungover for each session though, since he's improved too much since the 90's). Furthermore Tony Newton and Steve get to produce all of them and recreate the VXI sound. Janick gets every single solo. Everything is recorded live and in one take. Bruce gets a feather to tickle Nicko's feet while playing drums. Dave has to record everything with a frown. Adrian gets to follow every single vocal line.
There, I think this should piss absolutely every one off. If someone isn't angry enough inform me so that I can add to that.
Real answer: I'd focus on environmental issues and income inequality.
I quite like your real answer.