A king-size zombie quilt might be a bit much. Perhaps doing the his and her lap quilts with fabric themes each one likes is a good way to go -- warm wishes pattern would be fun and quick. Or, if you really want/need to focus on the king size quilt now, perhaps do it in another theme and hold the zombie fabric for lap quilts later. If you want to use the zombies in the big quilt, log cabin with a lot of other prints might be the way to go.