Why is Baby Driver already inspiring so much fan art?

Edgar Wright’s SXSW hit Baby Driver is still over a month away from its mid-summer release date, yet the fan art cottage industry is already cranking out comics, poster mock-ups, and illustrated portraits of the stars.
You can find this stuff on Twitter, Tumblr, and Instagram. But you can’t find much in the way of an explanation as to why all of these artists are so invested in a movie most haven’t even seen, and which doesn’t involve any familiar characters or properties