The Sandman graphic novels or the Smallville TV series.
Poul Anderson's novels, The Sandman and Smallville are three dynamic high points of American imaginative fiction. Each has had to resort to the concept of a multiverse in order to incorporate its branching narratives into a single fictional framework. We remember that the original Kal-L arrived on Earth 2 before World War I and that Anderson's characters from different genres can meet in the Old Phoenix. Some of us might wish that Poul Anderson had written a Superman novel as Isabel Allende wrote a Zorro novel.
In such fiction, Earth is in continual danger of being blown up. Krypton exploded in Action Comics, no 1, and Earth was sterilized in After Doomsday. And the same threat exists in reality - as long as thermonuclear weapons exist, they might be used. Sf is not escapism but realistic fiction.