Buried Secrets (Robin/Young Justice)
During a mission, Robin is sent into a coma, leaving no clues on how long he will sleep.
The team, including the Leaguers: Batman, Black Canary, Green Arrow, Flash, and Superman, go into Robin's consciousness. The find truths and lies in what was barricaded by thick walls put up by Robin. Even secrets that Batman don't know will be brought to light.
Robin can stay in his mind, avoiding everything that hurt him or his loved ones or face reality.