The (corrected) budget for the film was 20 million. Even if no one saw it, it's a 20 million dollar loss. That's a bomb, sure, but not even a legendary one. Mars needs Moms... THAT was legendary failure, mainly do to it's high budget. Now it depends on scale of percentage losses, if it's a loss greater than 90% of the budget THAT would be a massive flop relatively.The counter is now at roughly $225,000 as of this posting date. According to Box Office Mojo, this must gross $5 million at most in order for it to be considered a legendary flop. Let's hope for the best, people!
But it seems they knew this movie wasn't bound to make money, that's why they did it low budget. This thing is going to have a <20 million dollar loss no doubt... but hardly a $100,000,000 loss like MNM.