Let me make sure I've got this straight:

Season 1 (current): Transformation and first adventure of the Toa Kongero, run by Tobiax.
Season 2: Adventure of the Toa Kongero across the seas, run by DFTBA, potentially including a second toa team.
Season 3: Two teams, back in Kongero Nui. Internal city conflict and stuff. Run by Tobiax
Season 4: Run by Little Mx Inferno, possibly disconnected from the above.