At a recent event in Los Angeles, AusGamers played 90 minutes of Borderlands 3 and writes:
On Sanctuary III, youll be able to upgrade sections of the ship and even display items found in your travels as trophies. Numerous NPCs from the series history will make up much of your crew and will be able to be interacted with. Theres a greater emphasis on a sprawling story as you travel from planet to planet, and it doesnt appear to be overly linear with the team also mentioning being able to revisit planets. The planets are large, too, with multiple sections, interiors and more revealing themselves to me in my hands-on on Promethea…
Source: N4G PC Borderlands 3 Hands-On Preview | AusGamers