It may be -- but it's not a "sketch". A sketch is a quick, unpolished drawing.

Egad...I DID type "sketch", didn't I?  Ah well- as a buddy says, "live and lose..."

So now that they're going to go literal and make him more and more like a "real" spider, will he be shooting webbing from his ass-end?

Or is that area reserved for producing their ideas?

From wikipedia: re Morlun

Morlun had the ability to drain the life force from anybody he wished through physical contact. Depending on the power of the individual he drained, Morlun would then regain a degree of vitality and strength. Without periodic feedings, Morlun would age and weaken.

Morlun had some degree of superhuman strength and durability, although the degree of this is open to debate. Morlun certainly had abilities beyond that of normal humans, as he was depicting as lifting massive objects and surviving what would be lethal circumstances. Peter claimed that Morlun hit harder than any foe he had ever battled, including the Hulk and Thor. However, since Morlun was draining his life force from him, it is likely that the resulting power drain made Morlun's blows feel more powerful than they actually were.

Morlun has walked the earth for centuries, if not longer, and is a relentless and remorseless stalker. Once Morlun has physically touched somebody, that person is forever "imprinted" in Morlun's senses, allowing him to track his quarry down from anywhere on earth.