Image Universe

The Image Universe is a fictional universe where the stories in most American comic book titles and other media published by Image Comics take place. It is populated by a number of superheroes/villains including Invincible, Spawn, the Dragon, Angela, Bomb Queen and Witchblade.
The Image Universe is further depicted as existing within a "multiverse" consisting of thousands of separate universes, all of which are the creations of Image Comics and all of which are, in a sense, "Image universes". In this context, "Image Universe" is taken to refer to the mainstream Image continuity.
Publication history.
1990s.
The Image Universe began with the founding of Image Comics in 1992, launching with series such as "The Savage Dragon", "Spawn", "Youngblood" and "WildC.A.T.s".
Image Comics' nature of allowing comic creators to retain the rights to the characters they publish with Image had led to many characters entering or exiting the Image Universe as the creators move from or to other publishers. Image co-founder and "Savage Dragon" creator Erik Larsen generally treats the Image Universe continuity as though each title exists in its own universe, and any crossovers between different creators' characters are events that occur simultaneously in each respective characters' universes.
There were several Image crossover mini-series in the 1990s, such as "Shattered Image", "Altered Image", "Big Bruisers", "Deathmate", "Darker Image" and "Splitting Image", along with the Eclipse Comics satire "Spittin' Image". But only "Mars Attacks Image" had any direct impact on the titles represented, as the Martians' attack was also shown and referenced many times in the "Savage Dragon" series.
Departure of Jim Lee.
When Jim Lee was an Image partner, his WildStorm properties such as "WildC.A.T.s", "Stormwatch", "Gen¹³", "Union", "Deathblow", "Wetworks", and "Backlash" regularly crossed over with other Image characters, but when he sold his studio to DC Comics, this ceased, and the WildStorm characters were incorporated into the post-"Flashpoint" DC Universe. Most of the comic characters in the Image Universe however are originally individually creator-owned from when the company was established.
"The Invincible War".
In March 2009, the Image Universe had its first major crossover in several years with "The Invincible War", beginning with "Invincible" #60 and continuing across "Savage Dragon" and "The Astounding Wolf-Man". A second crossover, "Image United", began publication in November 2009; however, it was canceled after the rights to Youngblood were sold to Terrific Productions.