Batman / Judge Dreddd: Judgment on Gotham (1991 One-Shot) #1

By Alan Grant & Simon Bisley. 

“Judgement on Gotham”  

While investigating a strange device Batman is transported to Mega City, where he comes across a Law enforcement officer, less willing to compromise than he is. Not able to break Batman, Dredd calls on his partner Judge Anderson so she can use her telepathic powers. She finds that Batman is a good man, who is telling the truth no matter how strange his story sounds.