I believe the Royal pony sisters mentioned in the first two episodes aren't Celestia and Luna, but other ponies we don't know about yet. Celestia and Luna used the Elements of Harmony to defeat Discord and Sombra and later Celestia used it to defeat Nightmare Moon. The Elements then somehow ended up in the castle of the Royal pony sisters. Luna didn't know this as NM had to eavesdrop and follow the ponies to the castle before stealing the Elements. Celestia and Luna was the bearers of the Elements before the main 6 as said in s2e1. Thus the Royal pony sisters were the other bearers of the Elements with Celestia and Luna or they were the keepers of the elements who needed to keep them safe for the new bearers. I also think that whatever created the Everfree forest has some relation to the Elements being kept there and happened shortly after Luna was imprisoned.
Also, my wishlist so far for season 4, it's very demanding so read at own risk:
More Scootaloo! Seriously, we need another Scootaloo focused episode, a Scootaloo and RD episode and a CMC episode with Scootaloo as the main focus.
I want to see Twilight crash into the ground! We've seen RD and Flutters crash before, it wouldn't be fair if Twilight didn't ever crash!
I want to see Twilight forget that she can fly.
I want more songs from Sweetie Belle! And more CMC songs in general!
I want less Disney-esque songs! Not everyone of us enjoys it! Especially when two thirds of the songs throughout season 3 was like that!
I want more brilliant ideas from Apple Bloom and more devious ones from Sweetie Belle.
More CMC scenes like the milkshake one.
Four Rarity episodes to make up for no Rarity episode in S3, one with Sweetie Belle and at least one with whining.
I want Rainbow Dash's awesome character to keep shining in S4.
I want the old Pinkie Pie back from S1&2.
I want to really struggle to choose between RD and Pinkie as best main 6 pony!
And then I want Rarity to steal the show and become best main 6 pony for me of S4.
I want more good AJ episodes and a sad song from her.
I want more Stares from Fluttershy! That actually work!
I want Flutters to accidentally hit somepony, preferably Twilight.
I want an epic library adventure from Twilight, it would be more epic if she got lost in a library, and even more epic if she struggled with wanting to return!
More checklist!
More fainting Daisy, Rose and Lily
More Pinkie Pie overcoming her weaknesses and making ponies happy.
I want Pinkie Pie to solve one of the other main's problems.
I don't want to see Cadence, Shining Armor or the Crystal Empire throughout the entire S4! They can bring them back in S5
I want more family members of the others showing up out of nowhere and have a big impact on the story.
For goodness sake! Bring in Pinkie's sisters and give them canon names!
Manehattan! Phillydelphia! Los Pegasus! Want to be there!
I want to see the Elements of Harmony in action with the new Twilight.
Less dragons, more minotaurs!
Just bring back Trixie (again) and give her an episode she deserves that doesn't confuse the fans into stuttering madness.
More Twist! She needs to beat up that girl scout pony and take her place.
More fleshing out of Silver Spoon's character.
Return of Lightning Dust as an antagonist and ending with staying that way to complete her character arc.
Less Apple Bloom wondering into the Everfree Forest and more main 6 wondering into the Everfree forest.
Statistics: Posted by Bio_Plus — Thu Feb 28, 2013 12:58 pm