Kai is a Decoy ProtagonistLloyd will become The Hero of the next season and Kai will be his Big Brother Mentor instead of the Supporting Protagonist. The season will probably revolve around him learning the ways of spinjitzu and shifting into his role as the Green Ninja.
In season 2, Slithraa will return as Lord Garmadon's Dragon and take back his place as general of the Hypnobrai.Jossed all of the Serpentine general (minus Skales) act as his dragon.
Towards the end of season two, someone is going to find a loophole or way to cure Lord Garmadon of the Great Devourer venom so Lloyd won't have to defeat him.Or that's HOW he defeats him. The prophecy says the Green Ninja will defeat Garmadon, not destroy him.
Lord Garmadon and Lloyd will eventually be turned back to normal.It's just really sad keeping them as altered as they currently are...
Dareth will eventually join the team and become a real Ninja.It would be a shame if he never appeared again, especially after all he did for the team and his dream of becoming the Brown Ninja.
Dareth is the real Second Ultimate Spinjitzu Master.Dareth does seem to be a bit a goofy, but anyone can unlock their full potential. As said before, he has helped out. Also, he seemed to be immune from the dark magic.I never heard in the prophecy that the Green Ninja would be an Ultimate Spinjitzu Master, just that he would have his powers.Dareth's dojo class could be the next Ninja and he would be a real Sensei.
The First Spinjitzu Master is an incarnation of the Golden Dragon...Or vice-versa. We know from leaked 2013 set descriptions that there will be a Golden Dragon in 2013. In the episode "The Stone Army", when Misako is describing the history of ancient Ninjago, we briefly see such a figure before the image transitions to an image of the First Spinjitzu Master... much as if one is transforming into the other.
Misako was Sensei Wu's lover before she had a child with Garmadon.Of course, with this being a kid's show they wouldn't describe it in that exact fashion... but based on her and Wu's interactions thus far it's a possibility.
Ninjago is in Europe or is Europe (perhaps Eurasia).The map shown in "Ninjaball Run" resembles the continent.
The theme song line-up of ninjas and their allies will include Garmadon and (maybe) Zane's creator or Dareth.
The Overlord became the Darkness when he was defeated. When he was defeated by Llyod, he was thrown out of the Ninjago universe and entered ours. He was weakened by Llyod's final attack, which made him vulnerable to light and unable to exist by himself. He required a host to survive and gave his host weakened forms of it's original form. However, he was also to take control of his host as he did with Lord Garmadon if they continue to empower him.
There will be a sequel series, with Zane training the next generation of ninjas.As an ageless Ridiculously Human Robot, he is probably going to far outlive his True Companions. After having a Heroic BSOD and then spending some time meditating, the sequel series will have him as mentor to the next generation of ninjas, far in the future.
The series is being acted out by one of the future children of the main characters as his/her father tells him/her about his adventures.
Extended exposure to spinjitsu extends your life.Sensei Wu and Misako certainly seem to have lived an unusually long time.
Phythor isn't deadThe Great Devour ate him and Sensei Wu at the same time and Sensei Wu turned up OK aftter the Devour exploded. Phythor is presumed dead because he was nowhere in the remains of the Devour...But rember how his special ability is turning invisible? Him sneaking away invisibly makes more since than him getting digested while the guy who was eaten at the same is perfectly fine.
The Serpentine is a lost Chima tribe.What's the motif of the Legends Of Chima sets? Anthropomorphic animals with ridiculous-looking vehicles modeled after themselves. The Serpentine fit the bill perfectly, especially when the Fangpyre's vehicles are taken into account. Somehow, the Serpentine must have gotten separated or banished from their fellow Chima tribes and ended up on Ninjago.