That won't last long. He'll get tired of that once that baby arrives. Babies don't sleep through the night. That baby will have his/her own room before you know it.

Barring that, If I were the Mom, I'd go sleep in the starwars room and leave him and the baby in that room, let him get up for the night feeds and everything else babies require when they wake up through the night.
This reminds me of my sister when her newborn was waking up every hour and her husband would just sleep through it. She was so mad and sleep deprived, she went and gota tray of ice cubes and stuck them to his face, eyelids and every place else on his body including there... That taught him to leave the taking care of the baby through the night to her. He got much better after that.
