Jeffrey Dean who played Thomas Wayne in Batman v Superman: Dawn of Justice, in an interview with Cinema Blend, while promoting his latest film Desierto, spoke on the idea of the reason he was cast was because somewhere down the line of the DC Extended Universe, he would play Flashpoint Batman.
Dean goes on to say that the reason he believes Batman v Superman director Zack Snyder cast him as Thomas Wayne.
Maybe when he cast me that was kind of the goal. Hopefully DC can figure this all out, and in a few years I can come back and do a Flashpoint Batman! I would love it. That would be great.
I have not had any big discussions with him about [Flashpoint], but I remember when we were in Australia doing Watchmen press, and I was having dinner with Zack or whatever. And he was like, ‘My dream is to do the Frank Miller Batman.’ And he goes, ‘You would be an awesome Batman.’ The darker version.