You know someone is going to die...it pretty much has to happen. The question just is who. My list, with the likeliest first and least likely last:
-Abe's GF (Rosita I think, she is way too hot to survive too long)
Rosita is the hotest thing to come along in some time, although Maggie turned out alright after the 2nd season. Plus she's got that hot Brittish accent when she's off camera.
Someone always dies in the season finale and the mid season finales. Beth would certainly seem likely, and they did quite a bit with her before the disappearance. That would be crazy if she ends up being dinner for the group, could you imagine Maggie's face? Bob and Sasha can certainly go away, they don't bring anything to the show imo, but I would say they should keep Tyreese. Tyreese has turned out alright ever since the death of Karen, it's made him a more interesting character. The question is what he'll do next now that the Karen plot is resolved. Rick's not going, nor Michonne, and probably not Carl or Judith. Carol has tied up a lot of loose ends, so it's possible they could off her.
I too think that Eugene (Elvis scientist) is full of crap and he "thinks" he knows all the answers when he probably just heard a couple details over that transmissions from Washington. Abraham will be pissed when he finds out, he might go crazy on him. Maybe Eugene
never actually knew anything, but he made Abraham think he did to keep himself alive because he knew he'd never live without protection. In any even, Eugene will most likely be around as a major plot for season 5, along with Abraham and hopefully Rosita.
Daryl and Glen certainly look to be safe, and maybe it is foreshadowing that Maggie could end up gone with the burning of the picture. What if they turned it around and Glen happened to be the one that died? Cool twist that won't happen though. I think Maggie will make it to season 5 at least.
All that leaves is Tara, the girl that was traveling with Glen. She says that she's now going to follow Abraham and his crew now that Glen and Maggie are back together. I'm not sure what her angle is. I kind of understand if she's feeling some guilt about the prison attack and started following Glen, but I started to wonder if she was having feelings for him after awhile. That whole team up was a weird dynamic anyway "Hey, the guy I was following and was a mentor to me just happened to behead your father-in-law and mentor. Wanna be friends?" She had the option to travel with Abraham in a vehicle after she hurts her leg, but opts to stick with Glen and risk certain doom in the tunnel. Then, when she's likely to die when her foot is caught, and she tells Glen to leave her, he stays and nearly seals his own doom for this girl? Just didn't make a lot of sense, and it was a bit awkward when Maggie finds Tara and Glen together. Just sayin'...maybe she not 100% lesbo.