Fan Casting Thomas Wayne in The Flash: Flashpoint

Thomas and Martha Wayne weren't gunned down by Joe Chill, but it was Bruce who died in crime alley that fateful nigh. The trauma of that event pushed Thomas Wayne to asume the mantle of Batman, without qualms about killing, meanwhile his wife fell into madness and became the Joker of that reality. Thomas learns the truth of what Barry did, and in order to save his son, he tries helps Barry restore the original timeline