BotCon has shared some very interesting bits of information related to the Transformers WFC Kingdom Battle Across Time Mirage & Grimlock Leaked Listing posted today. According to the BotCon posts these figures are references to past stories. The Grimlock recolor of Beast Wars Dinobot art was created for the TFCC Shattered Glass Beast Wars story (see below), art by Dan Khanna and IK. Additionally, the Mirage art is from Transformers Operation Omega by an unknown artist. Check out their update with images below.
"...the Beast Wars: Uprising-inspired Maximal Grimlock figure into a raptor in 28 steps"
BW:U Grimlock appeared in the stories written by @jimsorenson, art by @IKY92791
Checked my Siege Mirage. Takes 19 steps to transform. Amazon listing could have a typo or Kingdom Mirage could have an extra step to compensate for Earth race car mode.