• "Last Day on Earth" is the sixteenth and final episode of Season 6 of AMC's The Walking Dead.

"Last Day on Earth" is the sixteenth and final episode of Season 6 of AMC's The Walking Dead. (Photo : Facebook/The Walking Dead)

"The Walking Dead" season 7 is currently in production, and some key characters still haven't been spotted on set.

According to the show's official spoiler site The Spoiling Dead Fans, it's possible that whoever won't be seen on the set of the hit AMC series is the same person who was killed by Negan (Jeffrey Dean Morgan).

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At present, there are at least four characters who haven't been spotted filming their respective scenes for the upcoming seventh season of "The Walking Dead."

This includes Michael Cudlitz's Abraham, Josh McDermitt's Eugene, Steven Yeun's Glenn and Christian Serratos' Rosita.

Among all of these characters, there are speculations that Abraham, Eugene and Rosita would be called to set when the series starts filming the second half of season 7.

However, the same cannot be said about Yeun's Glenn. The character was almost killed off in the premiere episode of season 6. Luckily, he survived the cut. This time around, it is still unclear whether or not he will be able to do so.

In the printed version of "The Walking Dead," Glenn was named as the sole victim of Lucille.

Meanwhile, Design N Trend claimed that Yeun wasn't also around whenever "The Walking Dead" cast had a panel or convention of sorts.

Unlike him, Cudlitz was spotted in a recent convention, but the actor no longer had his hair dyed in red color.

With this, if Glenn will survive, Abraham could be Negan's victim because the actor who portrays him no longer had to wear the same color as with Abraham's hair.

In the finale for season 6, Negan seemed to have targeted only one character, but some fans believe that he could have killed two.

Unfortunately, viewers still need to wait for a few months to find out who exactly was Negan's victim.

At present, the options for Negan's victim have been narrowed down to just two. Some fans believe that killing Abraham is the only thing that will make sense because Glenn is too important a character to be killed off.

"The Walking Dead" season 7 will premiere on AMC sometime this October.