Originally Posted by anomynous
Since apparently it isn't obvious enough that it's a poster promoting the second stage
No, it isn't. Because they put Megadeth on there. That makes the poster look like it's saying "Main Stage: Iron Maiden, Megadeth / Second Stage: Overkill, Warbringer", and it's therefore the complete line-up.
Obviously applying actual logic to this kind of silly self-promotion is overkill (no pun intended).