Don't Get Too Used to The Winchesters' OCs: There Might Be Deaths Ahead
This is no Game of Thrones, but still: maybe you don't want to get overly attached to sidekicks in The Winchesters.
The Winchesters has introduced the Supernatural fandom to several new characters that people seem to already be in love with. Is it a good thing? If you think about investment and the story's depth, then it certainly is. But what if something was to happen to those characters?
The prequel familiarizes us with two hunters who are friends with Mary: Carlos and Latika. They seem to be very charismatic and occasionally hilarious. However, we actually hear about them in The Winchesters for the first time, and they were never mentioned in Supernatural.
This thought led many fans into believing that sidekicks might get killed off in the future — an assumption that is not baseless given that deaths in the Supernatural universe are quite frequent.
"I think we have to go in expecting everyone is gonna be dead/scattered by the time we reach the 80's... Sam's known this since s3 (when Ruby told him all his mother's friends/family were killed mysteriously)." – @MittensMorgul
In fact, fans are already bracing themselves for the worst outcome, because the cozy and warm tone of the show is unlikely to remain until its finale — things just don't work like that in this universe.
However, one has to remember that deaths in Supernatural are reversible, at least most of the times. If some character is truly loved, chances are they might be revived. After all, the showrunners may simply have mercy for the characters in the first place and just never kill them off.
Still, people already established the connection between Supernatural and The Winchesters. In the original show, Mary (who returns from the dead in the final seasons) mentions in season 12 that all her friends are dead. This technically means Latika and Carlos are dead as well. But in season 9 episode 18 of the original show, there is an episode called Meta Fiction where Sam reaches out to a hunter named Carlos, who may or may not be that particular Carlos.
There is still a chance that the events of The Winchesters are some kind of a multiversal endeavor that are not necessarily connected with Supernatural — or connected in a way that is different from what the viewers now presume.
We'll never know until we have watched everything that The Winchesters has in store. New episodes arrive on The CW every Tuesday.