DC fanboy asks: Just what is Marvel Zombies?

[GNR]

I loved the Ultimate Fantastic Four comics where they first appeared, loved the first two issues of Marvel Zombies...even love the idea of the Fantastic Four Zombies being used with Doom in the upcoming Ultimate Fantastic Four...but, the last three issues of Marvel Zombies just seemed to get worse and worse, and the final issue really sucked.

I pretty much saw this as nothing but hyped up.