Under any other circumstances I wouldn't want to see any parallels between Batman's father and Donald Trump. However this is purposely meant to be different and out of the ordinary, so I'm willing to see what it's all about. 30 years ago some DC editor could've easily told Brian Augustyn and Mike Mignola that it's ridiculous to have a Victorian era Gotham City and we wouldn't have Gotham by Gaslight or Kingdom Come or All-Star Superman, or any revered Elseworlds story.
My concern is more about how the GA would react to something like that. Regular moviegoers likely have no clue about the Multiverse and while it's not exactly a difficult concept to grasp, the idea of Batman's father sharing similarities with Donald Trump in this version could seem utterly preposterous to some people. lol I guess I'm just hoping the audience is more open-minded, you know.