The Spectre and Tintin

 

These two may not quite match up in terms of power levels, but they both are determined mystery solvers, so I can envision a story where they might cross paths.  I can only imagine what  Captain Haddock's response would be when he realizes that Tintin's back up on this case is The Ghostly Guardan!

The Saturn 6

Just because you are tasked with protecting the cosmos, it doesn't mean that you can't do it with an enjoyment of the job and a healthy dose of humor.  That's the idea behind this team.  I think the biggest challenge that they might face is determining who to lead the group - they all seem to be the type that are more comfortable with handing out orders rather than following them.