Elbox makes money selling products to upgrade the classic Amiga computer, and the shark announcement was a key ingredient in getting people to invest in the old computer.
I don't think Elbox has any reason to announce that Shark development has stopped, and every reason not to make such an announcement.
I wouldn't hold my breath waiting on a Shark. Hey, I like the Elbox products, but until a product is shipping, its not part of my thinking. Non shipping products have a way of never shipping.