2025 is going to be a big year for Superman. With over 250M views and a million social posts, James Gunn's Superman teaser trailer officially became the most viewed trailer in the history of both DC and Warner Bros when it was released on December 19th.

With so much attention returning to the Man of Steel in the months and years ahead, it made a lot of sense to introduce the Superman CPI!

Over the past ten years, this index has produced a solid 53% return:

It wasn’t an easy choice to select the key issues for this index. Considering that Superman is the granddaddy of all superheroes, he's accumulated a lot of key issues since 1938. I've categorized his key issues into four categories: (1) the Grails; (2) Superman's mythos; (3) Superman's rogue's gallery; (4) iconic covers; and (5) first crossovers with other iconic DC characters such as Batman and Wonder Woman.

Of course, there will always be room for debate! We'd love to hear about what should've been and what shouldn't have been in this index.

The Grails

In this category are the Golden Age key issues that 99% of us could only dream of having even in low grade. I don't think I've ever even held an actual copy of one of these books in my hands.

Mythos

This group focuses on characters and events that are a part of the Superman mythos; i.e., the collection of concepts, characters, stories, and ideas from various versions of Superman's storyline. What would the Superman story be if we had never learned about the destruction of Krypton, the existence of the Fortress of Solitude, or that kryptonite was Superman's achilles heel?

Superman's Rogues Gallery

Superman has one of the most famous rogues' gallery in history. I included six of his most iconic nemeses in the index. Did I miss anyone?

Classic Covers

Over his 87 year history, Superman has graced some of the most iconic comic book covers of all-time. Excluding Action Comics #1 and Superman #1, below is a list of some of his most famous covers. The four issues below aren't really key issues except for the fact that they have famous covers.

Crossovers

Superman doesn't exist in isolation, but lives in a shared universe with other superheroes. In fact, one could argue that Superman wouldn't be Superman without Batman; they are DC's yin and yang. Although they both fight for justice, Superman is a symbol of hope while Batman inspires fear in criminals. Let's take a look at major crossover events in Superman's history.

What books do you think I missed? Should anything above be taken out of the Index? We welcome your feedback to make the Superman CPI as super as possible!