In the latest trailer of Avengers: Endgame, Tony is shown in a spaceship where he records a message.
In Avengers: Infinity War, Tony was stranded on Titan with nobody else. The spaceship he was travelling in was crashed there. And Nebula also crashed her spaceship while others were fighting with Thanos.
So, my question is, whose spaceship is this? Has Tony built a new one by himself? He didn't have any help as we can see only Nebula and him.