LEGO® Minifigures™ Series 15 were introduced in 2015. Collection includes: Queen, Animal Control Officer, Jewel Thief, Tribal Woman, Ballerina, Flying Warrior, Faun, Frightening Knight, Wrestling Champion, Shark Suit Guy, Clumsy Guy, Kendo Fighter, Astronaut, Laser Mech, Janitor and the Farmer.
The idea behind collectable Minifigures™ was that each minifigure come in a sealed bag, so you never knew which minifigure you might get. You can reed more details on Series 1, Series 2, Series 3, Series 4, Series 5, Series 6, Series 7, Series 8, Series 9, Series 10, Series 11, Series 12, Series 13 and Series 14.
Detailed information can be found on LEGO® website here.
Although released in 2015, not available any more You can still try to find them on eBay.
Some more information on this series can be found on Brickipedia.
Below you can find photos of all Minifigures in this collection:
