This penultimate issue is "Last Stand Against the Rot." My guess is the ultimate issue will be "Last Stand Against A Giant Creature With No Eyes and A Steel Reinforced Belly."
Does the plan begin by entering its mouth?!
I'm sure once he makes it there, the SoulGrinder will be remade. With it, Frank will make an army of Frankensteins. With his new army, he'll ride off to help out Buddy Baker in Animal Man #15. Ta da! That's it. If there isn't anything more important to scan or talk about, my rating will follow in the next paragraph.
Monument Valley, Utah. The rendezvous point.
Khalis is eventually overrun and rotted although it took a lot longer than most organic material. Victor Frankenstein floats up to the top of the Butte to break Frankenstein's heart.
You say semantics, I say semen-ticks.
Frankenstein, Agent of S.H.A.D.E. Rating: No change. One more issue to go before the end of Frankenstein and he has to find a home in one of DC's other 52 titles. Where will he end up? Teen Titans? Justice League of America? Oh, probably Justice League Dark. Or maybe now that he's made friends with Princess Amethyst, he'll take a vacation in Gemworld.