The Theme was Unlikely Team-Ups. Here is my contribution:
Planetoid is about a mercenary (Silas) who crash-lands on a planet where he must fight for survival against evil robots.
Debris is about a young woman(Maya) who lives on a post-apocalyptic earth, which happens to be ruled by.... you guessed it... evil robots.
Seems like a perfect team-up to me!
The similarities don't end there. In their first issues they both:
-Fight giant snake robots
-wield impossibly powerful firearms
These two comics are the Weeds/ Breaking Bad of the comic world.
Don't get me wrong, so far I think they're both great books. I just think some of these similarities are uncanny.
If you want to see more there is a preview of Planetoid here and preview of Debris here.