GOOD THING: Whatever your feelings about the metatextual exercise behind this two part story, (i.e. Superboy Prime - now a parodic strawman of People Who Complain About Comics On The Internet - goes on a rampage after finding out he is schedule to die in this comic) I think we can all appreciate the sight of Dan Didio screaming in terror. :)
BAD THING: I thought for a while that this ending was legit and that Superbody Prime really is being given all he ever wanted back as a reward by the "gods" that have played with his life for too long. And then I saw that his long-lost true love is wearing a black ring... despite not looking any more decomposed or undead than any of the other Black Lanterns. So it looks like Prime is about to get the Hope sucked out of him. Probably. For his sake - and ours, because I'm sick of Prime's whining - I hope this IS the end for him.
The Final Verdict: The heck of it is I don't know if this is skippable or not in regards to Blackest Night. I'd say go ahead and pick it up if you don't have problems with stories where the fourth wall is broken with great enthusiasm.