The player characters, members of the Justice League of America, learn that Mr.
[1] The players can generate their own superheroes using the rules in DC Heroes, or they can use the pregenerated characters for Firestorm, Firehawk, Hawkman, and Hawkwoman.
An Element of Danger was published the following year, a 32-page softcover book by Steve Perrin, with cartography by Jerry O'Malley and Greg Scott, and cover art by Ed Hannigan (sketch), Denys Cowan (pencil), Bob Smith (inks), and Bob LeRose (color).
[2] Pete Tamlyn reviewed An Element of Danger for White Dwarf #88, and was disappointed in the adventure: "Sadly, it is rather dull.
It is uninteresting, unexciting and has a deus ex machina ending which makes the whole thing a waste of time.