There were plans to create original Skylanders exclusive to Ring of Heroes before the game's closure. This included a Dark elemental mantis Skylander named Machetis, an Undead elemental bat-esque Skylander named BatGatling, an unnamed kangaroo-esque Skylander, and an unknown green Skylander. Additionally, two skin texture packs for an unknown dwarf character (both regular and awakened) were leaked.

Prior to the game's shutdown, several villains from across the Skylanders franchise were intended to be added to the game as enemies. These include:

• Evil Glumshanks from Skylanders: Swap Force
• Super Kaos from Skylanders: Imaginators
• A version of Kaos wearing his Emperor outfit from Skylanders: SuperChargers
• Bobbin Rood, Olaf Crushersson, and Runys Pointyboots from the Nintendo 3DS version of Skylanders: Trap Team
• A Goliath Drow, likely meant to be Brock from Skylanders: Giants
• Malefor, the main antagonist of the The Legend of Spyro games

Had these plans gone through, it would have marked Malefor's first physical appearance in a Skylanders game, with his previous appearances being in the IDW comics, the spinoff TV series "Skylanders Academy", and as a Skystone in Skylanders: SuperChargers.