What Happened To The Original Superman/Batman #85?

Here is the solicitations for Superman/Batman #85 that recently shipped.

SUPERMAN/BATMAN #85
Written by JUDD WINICK
Art by TRAVEL FOREMAN
Cover by MIGUEL SEPULVEDA

Witness Dick Grayson’s first adventure with Superman as Batman in this thrilling story that pits The Dark Knight and The Man of Steel against the monstrous villain Sabbac, a Kryptonian serial killer and an army of demon children!

But when it actually shipped, it was

Written by JOSHUA HALE FIALKOV
Art by ADRIANA MELO & JP MAYER
Cover by MIGUEL SEPULVEDA

The start of a new story arc! A body has washed up in Metropolis, and it looks like Batman’s the killer! Superman knows better, but Clark Kent gets assigned to go to Gotham to investigate. And that’s when things start to get
freaky…

And the cover was similar… but with a very distinct difference. Well, it saved having to pay Miguel to create a completely new cover.

But what actually happened here?

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