Being a fan of Lego Universe I've noticed some things in Ninjago and Chima that could be related to things in Lego universe
For Ninjago its the Dark matter and the Overlord. The dark matter makes anything evil. Malestrom does the same thing. Plus they look strikingly similar. The Overlord could be a represntation of Baron Typhoonus
With Chima I've noticed the chi is like imagination. There similar in colors and from the trailer. Chi makes Cragger stronger and it looks like an orb. Imagination makes minifigures stronger as well.
But this is just a theory. What are your takes on it.