Legion of Super-Heroes and Quantum Leap

 I didn't watch enough of the episodes to know if Sam Beckett ever leapt forward past the span of his own lifetime, but I'm sure he never went to the 30th Century.  Future jumps would have been cool to see, though, and made for some fun stories.  Especially if he leapt into the body of a certain Captain Jonathan Archer.

Quantum Leap and Sliders

This cover came from an idea that one of this blog's regular followers posted in a recent comment section (Mr. Acer, I believe).  I got a kick out of both of these shows, and I thought that given the concepts of their series, it was only natural that they would eventually bump into each other.  Throw in a cameo by DC's alternate timeline cop, and you would have a story that would've had my VCR primed and ready to record!