ChrisEarlier this week, the number-one movie at the box office this weekend seemed like a no-brainer. What Is Iron Lung? Iron Lung is a self-funded film adaptation of the hit indie horror video game, produced by YouTuber Markiplier. There’s no perfect comparison point, but a $10 million opening weekend feels like the floor, not the ceiling. Our Weekend Box Office PredictionsSend Help – $15 million Iron Lung – $10 million Avatar: Fire and Ash – $7 million Shelter – $5 million Zootopia 2 – $4 millionWhat are you seeing this weekend?