The showrunners have a very challenging season ahead of them, and the way they handle those final episodes is going to be the main determining factor in the long-term success of the show.
It’s not rare for productions to be discussed for years after they’ve finished, but the ending is always a critical component in making this possible. If fans are disappointed by the final moments of “Orphan Black”, then we also wouldn’t expect the show to remain popular in the long run.
The producers also have some interesting opportunities available with the various characters they’ve developed for this show, so we expect to potentially see some new developments in the future if there is enough interest. Of course, that depends on who exactly is going to get killed off during season 5.
There are some hints that the story could loop all the way back to the beginning of the show, where Sarah Manning witnessed the suicide of another woman. We’ve seen some revelations during the show’s course that obviously put that scene in a different light, and the producers would be smart to utilize it as a hook in season 5 as well.
In any case, we’ll find out what their plans are once the show resumes in April next year. Until then, fans have plenty of time to discuss the various rumors that are roaming around, but they should always keep in mind to take everything with a grain of salt.