when last Friday hit 23.2M, $77M weekend felt like the floor. then the film ends up a hair under $73M. proving that the weekends are indeed suffering a tad because of strong weekdays.
so as you say, it's tough to expect a massive 3rd weekend as a result. regardless, the film is doing phenomenal and at this point it's the sixth fastest to its current domestic film (I think)... and it's a freaking animation. that's insane crazy