With George Miller’s magnum opus, Mad Max: Fury Road, revving its engines as it prepares to roar into theaters this weekend, I found myself looking back at Miller’s filmography. Sure, we all know that he is responsible for films like Mad Max, Happy Feet, and Babe, but one project in particular stood out like a sore thumb: Justice League: Mortal. Indeed, in 2007, Miller was set to helm a Justice League movie filled with a cast of unknown actors that would shoot in the Australia. By all accounts, the project sounds pretty bonkers and some of the casting choices may actually melt your brain if you think about them for too long. However, the prospect of George Miller launching the modern DC Cinematic Universe is too tantalizing to ignore.

Then, my friend Jon Schnepp released his long-simmer documentary The Death of Superman Lives: What Happened?, which offers a deep-dive investigation of the untimely demise of the Nicolas Cage-starring, Tim Burton-directed, Kevin Smith-penned Superman Lives. If those three names don’t give you a sense of how batshit crazy this film could have been, then the documentary definitely will. Moreover, it made me wonder what other DC Cinematic Universe movies never made it out of the muck and the mire of development hell. So, today on The Dan Cave, I’ll be highlighting 6 DC Comics-inspired movies that almost happened, but then ultimately didn’t. If anything, it’ll take the edge off while we count down the days until Batman v Superman: Dawn of Justice.

What DC Cinematic Universe movie would most like to have seen? Let me know in the comments below.

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Dan Casey is the senior editor of Nerdist. You can find him on Twitter (@Osteoferocious), and pick up his new book, 100 Things Avengers Fans Should Know & Do Before They Die.