it is rumored that
Shadowrun is the future of
Earthdawn. meaning that many
characters seem to be
immortals that passed from Earthdawn's
timeline,
rewakening into Shadowrun's universe. several of Shadowrun's
dragons say things in the
novels that make it apear that they have knowledge of the Earthdawn
universe.
the latest clue is the grandest, apparently Earthdawn's backdrop is the planet Mars. satellite and rover surveillance of the red planet returned with pictures of a dragon skeleton.
FASA doesn't like to talk about these tie-ins. but they love planting the seeds.