That being said, I did verify that Brickipedia references an external source. The images on said source do not include confidential watermarks, which is uncharacteristic for leaks of this nature. It makes me a bit more skeptical.
Assuming it isn’t sigh another licensed theme, I’d assume it would be in the vein of Legends of Chima and Nexo Knights rather than constraction, but I’ll be pleasantly suprised if it is constraction.