The Theory time is here guys. I will start with Alaric and Landon Returning.
I think both of them will return next episode because Hope will be at the school and also Landon was seen into the trailer + Hope has some second thought about her humanity being off. Maybe Alaric tells Landon what is happening and Landon searches for a way back and recovers his powers. I think Alaric will be back as well but only for short time because at this moment his involvement in the story is ZERO. Also the only stories that really needs him will be The Merge or some Vampire Hunting( if the show wants to go back to basics but there are very little chances. Also the school has a very short number of students and he needs to recruit more. Also Alaric is one of the oldest characters in TVD as a main character.
For the villain side off story at the moment we have 100% confirmed Triad and The Merge(Gemini Coven Ghosts and other monsters that have the way to stop the merge) but we have some 50/50 as well:
Clarke's girlfriend: at the end of the latest episode we see Clarke's girlfriend being surprisingly interested about the supernatural world and because this plot will involve Clarke maybe finally will have some closure for him as a character and also some interaction between him an Landon. I can see something like that happening
Klaus has enemies: The Mikaelsons haven't always been the most good relatives. As the matter of fact only Freya was mentioned and shown in the most hard situation. She was the only one who was there for Hope. Rebekah was there but she wasn't the best aunt. In the season 2 Freya said that has a son(witch or werewolf, we don't know for sure) that wants to send to Salvatore school and if she decides to do so it will be a treat for the fans to see her for 3-4 episodes with her son and Hope in Mystic Falls and one of Klaus oldest enemies to show up( the most wanted will be Mikael because if Freya has a werewolf son that will make Michael very angry. Esther and Finn duo is also on the list and as TO showed they always find a way back and we know Esther has a grudge about vampires imagine what she will think about Hope The Original tribrid that has no weakness and I say that because we don't know that that stake that Cleo has will work because her power doesn't make it she always is right go see episode 2 of this season. And if Esther is involved her sidekick the zombie that always follows her commands Finn, Dahlia can also be invited. But that doesn't mean that a new villain that has a grudge on Klaus and his family will be bad, actually will be welcomed with open arms.)
Nature: we know that the force of nature wants Hope dead so what about the entire force of nature being a invincible creature that goes after her. That will make for a hell of a fight.
It is unknown if we will see this villains below but like the most of the fans I want some villains to be in the show:
Kaleb sire
MG sire
MG's mother being back as a villain
Sirens
And this is an idea of mine Hope being split into three(because she is a tribrid) every one of the having a different power and personality like one werewolf Hope is brave and honest, witch Hope shy and like Josie in season 1 and vampire(original) Hope a mini-Klaus in season 2 or three of TVD. And vampire Hope creates chaos and makes MG(because is a reaper) to switch his humanity off and the Squad and the two good Hope try to stop them. And if Vampire Hope dies so the rest of her versions. And also this will make the perfect moment to kill Mg off in way because and offer him a story i don't even see his role in the show at this moment besides comic relief and a love triangle between Lizzie,him and Ethan(honestly i prefer Ethan and Lizzie).
Also i have a theory about how the should end: Hope and Landon being immortal beings running the school. Josie being a hybrid (vampire-witch) and Finch a hybrid created by Hope to save her life recruiting more students. Alaric and Klaus both reach Peace together, Lizzie and Ethan being married with a full life ahead, Cleo and Kaleb hunting evil vampires, Jed being a real alpha and MG dead(i hate MG with all my heart because his role in the story and the fact that he is really the blame for what happened with Landon and Hope: if he give the ascendant to Hope she will saved Landon before Malivore got him and none of this will happening right now. And the fact that he single made the decision to keep the ascendant secret and not to save Landon even if he was the one in problems Landon will be there for him with no seconds to think. Also making the decision to be in Hope's team even if he knows that means killing Landon and Cleo i mean I am honestly amazed by what this kid thinks about himself as being a hero even if he doesn't know the first thing about being a hero and not forget he killed Landon one time, honestly Hope put Landon above everyone else only few times and she is hated and MG the worst and selfish choices in the show, like telling Ethan that he loves Lizzie, why he gets with nearly Zero haters?) The finale season should happen after a flashfoward and everyone returning after being away from each other for 5-7 years or so to save the school.
What do you think about this theories ?