The Artemis restructuring focused on increasing SLS launch cadence and prioritising surface activities, with broad Senate support. But it effectively sidelined Gateway, the planned orbital outpost that was supposed to serve as a transfer point between Orion and the lunar landers being developed by SpaceX and Blue Origin.
Both the Starship lander and Blue Origin's Blue Moon MK2 were designed with Gateway rendezvous in mind. Without it, NASA needs an alternative plan for how astronauts will transfer between their Earth-return vehicle and the lander that takes them to the surface.
Isaacman said the revamped Artemis III mission will now test one or both landers near Earth before they attempt Moon landings later this decade. But the orbital mechanics of a direct Orion-to-lander rendezvous in lunar orbit — without a station as an intermediary — present significant engineering challenges.
The changes reflect a pragmatic recognition that Gateway was becoming a bottleneck, but they create new problems that SpaceX and Blue Origin will need to solve on compressed timelines.