thomas and friends mini series

I think these may be missing on your list (they are pictured in the wave 3 collector's list)
Electrified Henry
Graffiti Paxton
Core Moments Victor (Victor is yellow)
Platinum Thomas

Thanks, I added Graffiti Paxton and Electrified Henry to the "Coming soon?" list at the bottom.
I'm assuming those will all be coming in Wave 4, along with:

• Double Bubble Gordon
  
• Iron 'Arry
  
• Creature Troublesome Truck
  
• Sports Edward
  
• Creature Stanley
  
• 4 or so DC engines
  

That would be 8 (9 in North America) "new in 2016" engines, after 11 in Wave 1, 12 (15 in North America) in Wave 2, and 9 (12 in North America) in Wave 3.

And to head off the inevitable questions no I have no idea when Wave 4 will be released! But it seemed like it was about 2 months between Waves 1 and 2, and about 4 months between Waves 2 and 3, so I'd guess that Wave 2 just accidentally shipped a little early and Wave 4 will arrive in about 3 months (early- or mid-October).