The scene between Lucille, Negan and Glenn being the most iconic moment from the whole Walking Dead comic series, and acts a catalyst for many things that come afterward. Surely the TV show wouldn't ruin all of that by choosing to kill off another character or lesser importance, would they?
2. Abraham: foretold by soda
This theory was a little strange, but was still enough for many to agree with. Redditor wazuh theorized that because Denise died in the same manner as Abraham did in the comics shortly after finding a soda called Orange Crush, red-headed Abraham would be Negan's victim.