As you might have seen on the collage I posted a few posts ago with my collection of inter-company crossovers, I am a bit obsessed with them at the moment. The quality is generally very poor but there’s something inherently fun about them.
I would like to take this moment to call for a minute of silence to the following crossovers, which might never happen:
       
   Darkseid vs Thanos commission by Jim Starlin 
           
   Batman and Deadpool commission by Derek Fridolfs 
               
   Only piece of art created for the announced but never started Batman / Gen 13 crossover 
           
   Batman vs Spider-Man by Michael Turner for the Last Man Standing section of the Wizard magazine 
               
   DC elseworlds Last Man Standing by Arthur Adams 
               
   Hellboy vs Spawn by Mike Mignola for the Last Man Standing section of the Wizard magazine 
           
   Batman beating Wolverine commission by John Byrne 
           
   Deadpool and Lobo commission by Reilly Brown 
           
   Lion-o vs He-Man by Ed McGuinness for the Last Man Standing section of the Wizard magazine 
               
   Boba Fett vs Deadpool by Ed McGuinness for the Last Man Standing section of the Wizard magazine 
           
   Spider-Man and Spawn cover by J, Scott Campbell for Wizard 
               
   Wolverine vs Batman by Mike Wieringo for the Last Man Standing section of the Wizard magazine 
          
Except the one with Darkseid and Thanos, of course … It’s already happened!
And, as a bonus, the King wanted to join the party too:

Captain America vs Batman by Jack Kirby