Then Robert Kirkman and Charlie Adlard changed it. And are almost 100 issues passed where that would have been.
But they did have a new ending in mind.
Well whatever it is, it is not going to be the same as the ending of the TV show, as Kirkman explained to Kevin Smith on AMC's Geeking Out. Least of all, because he's not telling people on the TV show what it is.
And especially because he doesn't expect the TV show to continue as long as the comic book will…
So anything could happen with Negan.