I can assure you guys that I have had this set for more than 4 months now. >_<
Lego parts in sealed bags, instructions manual and stickers sheet (for SY211B and SY211D):
Assembled set:
SY211A:
The turtle vehicle is from Lego 10669 Juniors Teenage Mutant Ninja Turtles Lair.
SY211B:
The cart is from Lego 30271 Mikey's Mini-Shellraiser polybag while the newspaper vending boxes is from Lego 79118 Karai Bike Escape.
Applied stickers:
SY211C:
The glider is from Lego 79105 Baxter Robot Rampage
SY211D:
The barricade gate is from Lego 79115 Turtle Van Takedown while the motorized skateboard is from Lego 79101 Shredder's Dragon Bike.
All four assembled sets.
Assembled minifigures:
From left: Donatello with goggles, Leonardo with scuba gear, Raphael with armor, Michelangelo - Jumpsuit
If you noticed, there are two types of design for the turtle shell. Donatello and Michelangelo with dark brown horizontal belt pattern while Raphael and Leonardo with dark brown horizontal and diagonal belt pattern. I have checked with Bricklink and I find these parts exactly as was produced by Lego.