This actually confirms some suspicions I've had about the G650. It made no sense to me that Gulfstream was launching a clean sheet airframe with these RR BR725s that are based of a 20 year old engine. So I always suspected that Gulfstream was going to integrate new engines for increased range at some point.
I think that this Global announcement is more evidence of this because both Gulfstream and Bombardier are working with the same types of customers and if they demanded upper 7000nm range then thats probably what the Gulfstream G6XX will make after they put new engines on it.
But how can you fly 7900nm at M.85 with 3 pilots? Seems to me like you would need 4 pilots for that job...