Removing the mortician angle (provided it was removed) eliminates a connection to the C.C.P.D., which may confirm Rosso is not familiar with Barry or Joe.
In The Flash Season 6, it sounds like Rosso is going to be an Oncologist, who has helped patients treat cancer with his various methods.
The odds seem good he’ll enter the story as a complete stranger to Team Flash.
Ramsey Rosso has been portrayed as a mortician in Central City, which is a job that allowed him to experiment on the properties of blood.