Revealing mistake: There is a shot where the point of view of the camera is looking down at Christian and Toulouse from the opening in his ceiling. You can see John Leguizamo's legs behind him and that he is kneeling down. (00:06:00)
Revealing mistake: Throughout the movie, if you listen closely to Ewan when he whispers, you can hear that his accent switches from English to Scottish.
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.