That's your opinion. JW was an amazing film. Don't get the hate it's receiving. It deserved every last dollar it got. It's possible to like JW, TA, Avatar, and TFA at the same time.
I'm sure I'm going to get a lot of hate for this, but this movie doesn't deserve to beat Avatar. Unlike Star Wars, Avatar was built on pure word of mouth, almost no hype upon release. TFA is from a franchise continuing from a 40 year legacy, hype was inevitable. What Avatar did is to be respected in my opinion.
Hate to be a killjoy, but some of your estimations are incredibly unrealistic. You're forgetting that this movie had an abnormal opening weekend built on hype. The preview opening and first day gross compared to sat and Sunday are proof of this. Demand is burnt more than you guys think. You can't just use a regular multiplier for that kind of weekend. I say this slows down and ends at 650.