You might want to check out Spider-Man: The Other. I just got done reading it a couple of hours ago. It's not Morlun heavy, but it's a bit of a sequel to Darkest Hour as far as Morlun is related. And it gives you an idea of how big of a bastard Morlun is.
I haven't read the Spidey comics that first have Morlun that Spider-man barely escapes from (which is described in The Darkest Hour), but I recommend The Other.
