Whoah dude... one of the best things about the last series of The Walking Dead was the idea of putting everyday folk (and their everyday drama) up against a sudden zombie outbreak. That's what made the pilot episode (with the father & son trying to deal with with their mother who'd turned zombie) so fascinating and engaging. If you're after some standard zombie vs human action, there's numerous straight to DVD flicks around instead.
As for a Dead Island film... I remember reading an article the other week where the author was disappointed at how the game didn't have any of the emotion the trailer seemed to promise. Indeed it's true, and actually, maybe a film is the best way to do it.