I think Abraham is on borrowed time not only because of his arc in the comics, but because he's on his way to being "happy". This also does not bode well for Carol/Wall building guy, the lesbians, nor Glenn/Maggie.
Kirkman has hinted that someone other than Glenn will get to meet Lucille first, which also means those polaroids are a preview to whats in store.
Neegan seems to have a much larger operation going on in TV land than he did in the funny books. I'm guessing:
This season will end with us meeting Neegan.
Next season's first half will be dealing with Neegan paying a visit to Alexandria (how they're going to do his dialogue for TV audiences is beyond me) & then getting into bullet manufacturing while meeting the Kingdom.
All out War for the 2nd half of the season.