Monogram Direct has revealed more Kingdom Hearts 3D Form rings on their website. Series 3 will contain Halloween Town Sora, Organization XIII Roxas, Axel (with his Eternal Flames chakrams), Terra, Aqua, Naminé, Xion, Halloween Town Donald Duck, Halloween Town Goofy, the Earthshaker Keyblade, and the Rainfell Keyblade. Monogram Direct revealed Series 2 back in March. The Series 3 set will be available December 2017. You can view the set below:
UPDATE [Jan 9, 2017]: BoxLunch and Hot Topic have recently added Series 3 Blind Bags to their websites, but both sites have them currently Out of Stock. Box Lunch will be selling each bag for $6.90 USD while Hot Topic is selling the bags for the same price, but online orders can save 20%, bringing the price down to $5.52 USD.
Monogram Direct have also uploaded an unboxing video of Series 3 on YouTube. You can watch it below:
UPDATE [Jan 25, 2018]: You can now purchase the Series 3 of the Kingdom Hearts 3D Foam Keyring blind bags at BoxLunch. Each blind bag will cost $6.90 USD. You can purchase the blind bags here.