The mainstream DC Comics version of Robin Hood is Robert Fitzooth, the 12th century Earl of Huntingdon.

[1][2] In More Fun Comics #82 Speedy and Green Arrow use "time pills" confiscated from a mad scientist named Professor Wurm to travel back to the 12th century era of Robin Hood.

Batman also takes part in an archery tournament sponsored by the Sheriff of Nottingham, all thanks to Professor Carter Nichols and his "time hypnosis" technology.

[4] Green Arrow travels through time again, and switches places with Robin Hood in World's Finest Comics vol.

1 #264, while visiting Sherwood Forest, Green Arrow and Speedy discover a time machine in a secret World War II laboratory.

They both travel back in time where Green Arrow temporarily takes the place of an injured Robin Hood.

In the story Green Arrow once again stands in for an injured Robin Hood, he is captured by the Sheriff of Nottingham but later rescued by members of the JLA and JSA.