All December long, I will be doing daily installments of Comic Theme Time. Comic Theme Time is a twist on the idea of a "Top Five" list. Instead of me stating a topic and then listing my top five choices in that topic, I'm giving you the topic and letting you go wild with examples that you think fit the theme.

Today's topic is "was the best company-wide superhero crossover?"

Some examples include...well...you know, there's one every year!

What's your pick?