As usual, we can often learn a great deal about upcoming releases and waves simply by monitoring other retail sites...While GameStop is somewhat tight lipped, their counterpart routinely offers up insights via pre-orders for individual characters, something we rarely get here in the US.
Check it out:
Trap Masters:
Gusto
Jawbreaker
Krypt King
Wallop
Wildfire
Newlanders:
Chopper
Torch
Funny Bone
Series 2
Sure Shot Shroomboom
Series 4
Tidal Wave Gill Grunt
Eon's Elite
Spyro