When “Batman v. Superman: Dawn of Justice” explodes onto the big screen next spring, Sen. Patrick J. Leahy will most likely be able to once again watch himself contribute to the mythology of his favorite caped crusader.  

The Vermont Democrat, a diehard comic book fan, has appeared in four prior Batman movies dating back to Val Kilmer’s lone turn behind the mask in “Batman Forever.”  

Leahy seems to be in the mix for director Zack Snyder’s bid to unite DC Comics’ pantheon of heroes a la Marvel’s mega successful “Avengers” series, appearing (ever so briefly) in the trailer released on July 11 in conjunction with Comic-Con International.