Not really sure if you would call it a "theory", it's totally a morph that is possible and can be produced that a lot of breeders are working on, it's just the nature of double recessive. That stuff takes time between raising up the dbl. hets and then breeding them in hope they hit both recessives.
no pictures means it did not happen so it is a theory in my book lol. you are right it is possible and those odds are tough. Cant wait to see it though.