We don't tend to do many "requested" tribute items - we're of the opinion that a tribute should come from a place of understanding and so if one of our artists isn't personally connected, we don't usually do a tribute. Other things factor in, but that's the main reason that not every celebrity that passes gets a tribute.
That being said, this is the sort of tribute that we'd more likely fit into our own zombie-apocalypse holiday as there is a definite place for it there!