Source: Planetary/JLA: Terra Occulta #1 (2002)
Three heroes were actually CREATED by Planetary's shenanigans, and in Terra Occulta, they're in league to take down the superhuman regime. There's Bruce Wayne, whose family opposed Planetary and were killed for it before his eyes. There's Princess Diana who left Amazon Island just as it was nuked by Planetary. And there's Clark Kent whose parents were murdered so Planetary could steal and retro-engineer the Kryptonian tech in baby Kal's space capsule. They operate under cover of darkness, in satellite blackouts and definitely not in costume.