Tarzan and Jonny Quest

These two properties were among my favorite non-superhero cartoons when I was a kid.  Both had limited production values, with heavy re-use of stock footage and music cues.  Still, the strength of the characters and the exotic locations and situations were enough to keep me coming back.  It would have been great to see their animated worlds collide.

Superman and Ant-Man in "Ambushed... by the Absorbing Man!"

I've been dying to see the Absorbing Man really let loose in live action.  He would make a great villain for either The Hulk or Thor.  We got to see Bruce Banner's father with a similar power set in the first Hulk movie but that was so dimly shot  that is was ultimately unsatisfying.  The real Absorbing Man has appeared a couple of times on Agents of S.H.I.E.L.D. and I've liked what I have seen there, but the limits of a television budget really held him back.

Superman and Ant-Man first crossed paths in STF #329...

Dick Tracy and Nick Fury

One of the Reasons characters like Batman, Spider-Man and The Flash have enjoyed success on TV is because they have great rogues galleries to draw upon.  Dick Tracy has one of the best line ups of villains around, which makes me think the character would be perfect for a series that could take its time exploring them (rather than cramming them all into a single story, a mistake the movie version made.