I have no doubt what so ever that life exists on Mars. However, it would have to be genetically completely different from earth based life to be a game changer.
Rocks from both planets have visited each others surfaces in the past and that would pretty much kill any claim of a "spontaneous start-up " of life on Mars....
Rats.... on so many levels. How would the creationists cope with that lolly I wonder....
Maybe just bogan earth feral bacteria ponging up the joint...