Visible crew/equipment: During the The Pitch, a crew member is visible after they sing "elephant, Bohemians, Indians, and courtesans...". He can be seen wearing a green/gray baseball cap, pushing the bald man who is hanging on the chandelier.
Visible crew/equipment: When Nini is doing the dance to Roxanne, you can see a very visible cameraman when one of the male dancers lifts her over his head. If played in slow motion, you can see that the spotlight even focuses on the cameraman for a split second.
Visible crew/equipment: When Satine is singing 'One day I'll fly away,' she goes up the steps to the top of the elephant. If you look to the top windows of the building behind her, you can see a strange shape gliding past the lit windows from left to right. I'm not sure what it is, since it isn't the shape of a person and it looks like it's on a track. Then when Satine sings, 'Why live life from dream to dream?' the shape goes back from right to left, and at the last second, before it cuts to Christian, the lights go out. Now, I've seen the behind-the-scenes of footage of Moulin Rouge, and that scene was probably behind a blue screen so I haven't a clue what the shape is.
Answer: He wallows in self-pity for a while, then eventually begins to write their story. There's no indication that he has any further links with the Moulin Rouge - it would probably be too painful for him. Christian actually states in the movie that the night Satine died was the last time he ever stepped foot in the Moulin Rouge.
Tailkinker ★
In what scene did he state that I'm curious.
When he talks about going back there to see if she still loves him. Right before he goes back there that last time.
When Christian sneaks back in after having been tossed out, he says he returned to the Moulin Rouge one last time.