Season 4 Episode 1 and 2
Part 1 - Princess Twilight is busy adjusting to her new wings and new role in Equestria when Celestia and Luna go missing. Meanwhile, her friends are all having unusual troubles of their own and it will take all of them working together to help find the missing royals.
Part 2 - The ponies need to put the rest of the puzzle pieces together to find Celestia and Luna before it’s too late. Their journey becomes even more dangerous when they must travel deep into the heart of the expanding Everfree Forest and learn stunning news about the Elements of Harmony.
And the voice credits have shown that Discord will be making appearances in both episodes.
Season 4 Episode 3
Castle-Mania - While in Luna and Celestia's old castle, the ponies are convinced it is haunted by the Pony of Shadows.
Season 4 Episode 4
Daring Don't - Rainbow Dash and friends offer to help their favorite author finish her latest book.
And that is that, a lot to chew over while we wait.