I got this from another soap board but it turns out Johnny will be the real father of one the Mitchells either Grant, Phil, Sam or Billy. I think it would be better if it was Billy or Sam since Grant and Phil are too alike in character and appearance to be stepbrothers.

Billy would be better since he is finding hard being a Mitchell and it would give him a good storyline and go back to the storyline of him being beaten and abused in foster homes.