The Cobra Viper with swappable head from the Modern Era Viper 5 pack has turned up again on auction site Tao Bao. While officially just another Viper, this 25th Anniversary figure is pretty much an homage to Mercer in the eyes of fans.

This mold uses the original mold with the bent wrists and helmet sans
chrome with loose goggles. Fans still want a 5 pack of 25th/Modern Era
Vipers, but with the new, "fixed" wrists; the mold used for the Hall of Heroes and Cobra 5 pack.