The theory that gets everyone really excited about connected universes is probably the
E.T. theory, proposing that
Star Wars is both true, and a legend that has been passed down in the
E.T. universe. This explains those E.T. lookalikes appearing in the galactic senate and E.T. recognizing a boy wearing a Yoda mask. That's a good theory, but hardly mind blowing, so the
shared universe theory we want to address is the proposition that Joel Schumacher's
Batman Forever and
Batman & Robin are, in fact, connected to Tim Burton's
Batman and
Batman Returns.