I think even Zack Snyder understands that it would cost a lot of money to finish the effects needed, etc. and he and WB have moved on. Understand that Mamoa probably saw a rough cut with plenty of "scene mussing" slugs or rough animatics (at best) for SFX scenes, and shots of him and others standing in front of a green screen.I’m torn on how I see Snyder’s apparent unwillingness to let this drop. Part of me thinks it’s a bit sad and that he really should move on. But part of me admires the fact that he clearly feels so passionately about it and still hopes to see his vision onscreen.
WB may consider it throwing good money after bad because the post production and fabrication costs are more then they'd expect to get IF they put it out there for sale.