WHEN ISAAC “IKE” Perlmutter, the chief executive of Marvel Entertainment, showed up at a West Palm Beach, Fla., law firm on Feb. 27, 2013, he had no idea he was about to become victim to a caper worthy of one of his company’s comic books. Israel-born Perlmutter, 73, guards his privacy like Iron Man does his arc reactor, avoiding photographers and refusing press interviews despite steering Marvel through bankruptcy and selling it to Disney in 2009 for $4 billion. That winter day, Perlmutter arrived at the firm to answer deposition questions on whether he quietly had funded a lawsuit against his nemesis at a swanky Palm Beach residential community over its tennis courts. What Perlmutter said, however, wasn’t as important as what he and his wife, Laura, were touching. Because…