In some comic storylines, Constantine's sexuality is ambiguous or not clearly defined. It depends on the specific interpretation and version of the character.
In some comic storylines, Constantine's sexuality may be explored or depicted in a way that suggests he could be gay, but it's not a consistent or definitive aspect across all of his appearances.
Definitely. The film Constantine takes inspiration from the comic and incorporates many elements and storylines from it. However, there are some creative changes made to adapt it for the big screen.
In the comics, John Constantine's sexuality is indeed shown to be bisexual. This aspect adds depth to his character and is part of his complex personality.