Since The Walking Dead is quite a popular show, it eventually got a green-lit spinoff with Fear the Walking Dead. The issue is how the storylines of each show will fit together, and it is possible that the release date of Fear the Walking Dead will coincide very well with Season 6 of The Walking Dead.
After Fear the Walking Dead was first announced, the release date was supposedly going to be in the early summer, possibly June 12. According to the Inquisitr, this date is yet to be confirmed or denied by AMC. Of course, with Season 5 of The Walking Dead concluding on March 29th and returning on October 10 or 17, one has to wonder if Fear the Walking Dead will show up just before Season 6 of The Walking Dead commences.
If that were to happen, then Fear the Walking Dead would begin, and then The Walking Dead would begin. This would seem an odd play, but there are talks that these shows would cross over. If that were the case, then Fear the Walking Dead has some catching up to do. When last we heard, Fear the Walking Dead starts out before the beginning of the zombie apocalypse, which means that the spin-off show has some catching up to do before it effectively hits the Season 6 timeline of The Walking Dead.
Robert Kirkman, the executive producer behind The Walking Dead Series as well as creator of its comic book source material has stated that Fear the Walking Dead deals with "watching the world crumble around them, and people are very much unprepared for this world that they're in and having to very quickly adapt", according to Geek.com. This is a very different beginning from the first episode of The Walking Dead which featured the main character waking from a coma into a world filled with zombies, and he never actually saw the fall of civilization as he was "asleep" for it.
According to Cinema Blend, the show will feature Cliff Curtis as Sean Cabrera, an ex-gym teacher who is in a relationship with a guidance counselor named Miranda. The part of Miranda will be played by Kim Dickens, who is a basic "girl next door with an edge to her", according to The Latino Post. Miranda (some sources call her Nancy) has two children from a previous marriage with a dysfunctional Nick (played by Frank Dillane) and ambitious daughter Ashley (Alycia Debnam Carey). It looks like Sean will have some family members along for the zombie ride with a flower child ex-wife name Andrea, as well as a son named Cody.
The show is planned for a six-episode run, which isn't very long. It would be possible to introduce characters or story elements on Fear the Walking Dead, and then bring them in to Season 6 of The Walking Dead. Melty reports that The Walking Dead Season 6 is now beginning filming in Manchester, Georgia. Apparently it will begin in the Alexandria Safe-Zone, which follows a storyline in the comics as Rick and the other survivors tried to "settle down" in a walled city. Considering that this safe setting did not last long as internal struggles and an invasion of zombie walkers ended this chapter of The Walking Dead graphic novel story.
Assuming that the Season 6 of The Walking Dead will go that direction, it practically begs Rick and his crew to meet some new friends, ones from Fear the Walking Dead. Of course, if these shows do have a long range plan, then you'll have to tune in to AMC in mid-summer or the fall to see it.