Night at the Museum legs (3.55 x 6th weekend) from here on out will get Jumanji Welcome to the Jungle to 396.37 million. Let's assume it'll have a mini collapse (BP takes steam off J2's domestic BO run next month) and achieve a 3.2 multiplier after the 6th weekend. Then it'll finish with 390.5 million.
OS figure is a bit harder to predict but 1.5 times the most recent weekend (China will cease to make a significant contribution) doesn't seem a long shot. So (1.5x17.7) gets the OS total up-to [484+26.5]=510.5 million.
World-wide total becomes [390.5+510.5]=901 million. It still hasn't opened in Japan yet so Jumanji 2 should easily clear 900 million when all is said and done. The movie will release in Japan on April 6th so it's going to be a really long wait.
BTDubz, Jumanji 2 is Sony's 5th biggest movie of all time atm.
SM:H, Spectre & SM-3 are toast as Jumanji 2 is going past 900 million. So #2 (behind Skyfall) in Sony's all time list is guaranteed (domestic and WW). On the international front, Jumanji 2 is likely going to finish at #6 (Skyfall, Spectre, SM-3, SM:H & Da Vinci Code).