Matt Mullins (born November 10, 1980) is an American actor and 5-time martial arts world champion who portrayed Johnny Cage in Mortal Kombat: Rebirth and the Warner Premiere produced web series Mortal Kombat: Legacy. Mullins is best known as Len / Kamen Rider Wing Knight in Kamen Rider: Dragon Knight.
However, he wouldn't returning in season 2 on shogungamer.com:
He won’t be reprising his role as Johnny Cage. Portraying Cage both in Kevin Tancharoen’s original pitch/off-shot feature MK: Rebirth, and the 1st season of Legacy, Mullins has sadly been recast by a yet to be named actor.
Matt Mullins at the Internet Movie Database