Except he didn't write Begins on his own, Chris Nolan co-wrote it with him. Man of Steel is half a year away & so not relevant (although Kurt Johnstad was hired to rewrite part/all of it).
Goyer also has these gems to his name:
The Unborn (Written by)
Blade Trinity (written & directed by)
Ghost Rider: Spirit of Vengeance (story/screenplay. 1 of 3 writers)
Jumper (screenplay, 1 of 3 writers)
and the crown jewel;
Nick Fury: Agent of Shield (written by)
So you see my apprehension over him trying to claim full credit for MoS, and my skepticism at anyone wanting him to write more movies.
The
only way I'd be cool with him writing JL is if he was co-writing with someone who is far better than he is. Him on his own is the last thing a JL movie needs.