The events of the war were something like 20 years ago at this point in the show (Dany, Robb, Jon, etc. were all born near the end of it). Nikolaj Coster-Waldau looks like a cartoon prince, but he doesn't look like a 20 year old cartoon prince.
I also get the impression that Martin doesn't want to tell that story, leaving some of the events to the reader's imagination/theorizing. If so, we would be seeing Benioff and Weiss essentially write fan-fic and that probably won't end well.
I also get the impression that Martin doesn't want to tell that story, leaving some of the events to the reader's imagination/theorizing. If so, we would be seeing Benioff and Weiss essentially write fan-fic and that probably won't end well.