I had this thought a few months ago but just today decided to look through some actual opening to see how well it stacks up.
( OW - midnights/previews ) X 0.45 = Weekend #2
Movie - Rule - actual weekend #2
AVNGR - 84.93 - 103.05 (X)
AVNG2 - 73.65 - 77.45
IRNM3 - 71.35 - 72.53
HPOT8 - 56.56 - 47.42
BATM3 - 58.63 - 62.10
BATM2 - 62.96 - 75.17 (X)
HGAM2 - 59.77 - 74.18 (X)
HGAME - 59.78 - 58.55
SPID3 - 64.63 - 58.17
FAST7 - 59.12 - 59.56
Avengers and the dark knight both had insane levels of buzz and little competition the week after opening, and Catching Fire had thanksgiving weekend for it's #2. I'm even kind surprised how close it gets for Deathly Hallows 2 given its crazy midngiht number.
I don't see Jurassic World being anything like TDK and Avengers so for next weekend my prediction is $85m (which of course is still exceptional).
Also I have this gut feeling that the marketing for Inside Out doesn't have the narrative hook needed for it to really break out and in the wake of JURA4 it will probably not reach the level that the most recent tracking of $60m had for it. But I have nothing to base that on so... yeah.
(I didn't feel like doing all the harry potter and twilight movies though so I stopped with Furious 7)