He also teased the character could return for more cameos in the DC universe
The writer-director shared a glimpse at the completed script with fans after several delays left them doubting the film would ever materialise
The film is scheduled for release in 2027
His first movie in the DC Universe, 'Superman' is released next month
The follow-up is scheduled to be released in 2027
The DC boss also talked about the pitfalls of post-credits scenes
"Sorry, second best, but yes, Happy Birthday, Henry!"
'Superman' will kick off James Gunn's DC universe this July
The completed film was shelved in 2023
"What I was bringing to work every day was a lot of unhappiness”