Imagine a brand new universe on top of the DC and Marvel multiverses. This one stands apart from their multiverses and is believed to be the only universe by the people who exist in it. In this universe, DC and Marvel characters have always existed in the same universe and all know each other. There are teams like JLA, Avengers, Teen Titans, and X-Men. The only big difference is that all of Marvel's teen heroes join the Teen Titans rather than Young Avengers or anything else Marvel created. Also, there is less hatred towards mutants because of Superman befriending some mutants but there is still reasons for the existence of the X-Men team. And in this world, team-ups between DC and Marvel characters are on a everyday basis. Batman and Daredevil are actually friends. Lex Luthor is actually a leading member of the Masters of Evil. 
 
But what they don't know is that there is one other universe out there. The Dark Horse Universe is their Earth-2. 
 
In this story, two mysterious villains from "Earth-1" go to the Dark Horse Universe and kidnap Abe Sapien, bringing him back to their universe. Hellboy discovers what happened and the B.P.R.D. send him to "Earth-1" to rescue him. After realizing he can't find him alone, he accidentally crosses paths with Deadpool. He asks Deadpool if there was anyone good at solving mysteries and Deadpool suggests Batman. They go to Batman and he decides to help them. So Batman, Deadpool, and Hellboy team up to try and find out who kidnapped Abe Sapien and rescue him. 
 
It will have guest appearances by Superman, Wonder Woman, Nightwing, Cable, Spider-Man, Hulk, and Liz Sherman. (Just to name a few). 
 
What do you guys think of this for a mini-series or a one-shot?