This challenge is actually an easy one for me, as the topic I am going to talk about is one I was planning on doing. DC Comic has been doing a He-Man and Thundercats limited series crossover event. I was going to wait until the series finished up to write about it, but it fits this challenge too well.
The series starts off with Mumm-ra and the Spirits of Evil working on a plan to find a way defeat the Thundercats by acquiring a weapon more powerful than the Sword of Omens. They are able to move Third Earth to the orbit of Eternia during a coming of age ceremony for Prince Adam. Of course all chaos break loose.
I'm not going to go much into the details of the storyline, as right away things get interesting and I don't want to spoil it for anyone. Just trust me that it does not take long before you ask 'did that really just happen?'. Of course Skeletor and Mumm-ra do team up, but it is not as simple as you might think.
Right away we are given a good connection between the two worlds that made sense. As these two franchises have a lot in common with their mixture of magic and technology, so connecting them was not an issue as they fit together just fine. In fact I have always felt it was fairly obvious that Thundercats was trying to get in on the popularity of Masters of the Universe.
What I found most interesting was what canon was used from both.
They both came out it the 80s with their basic storylines, although Masters of the Universe did take a years or so to stabilize its best known storyline. While thanks to what MotU started, Thundercats was able to come in strong with their storyline from the get go. Both of the franchises faded away and had recent reboots that were actually much better than the original, but regretfully neither took off even though both were worth watching.
So in He-Man and Thundercats, the writers went with the most basic Thundercats canon, staying with the original characters unaltered from what we had been given in the 80s cartoon, not even making use of any of the characters introduced later in the series.
For MotU however, they used the hybrid storyline that Mattel has been using for their on-line collector's club figures. This storyline is a mixture from just about all things MotU starting with ideas from the early pack in mini comics all the way through the last cartoon reboot. The official canon is about as complex as it gets with all these elements mixed in there, even though He-Man and the Thundercats does not do much in exploring this new hybrid canon.
So we have one issue of this crossover event that was a long time in coming remaining. While I do expect somewhat a cliche end to the story, since they have done an impressive job with surprising us so far, I am looking forwards to seeing how they wrap it all up and what final surprises they have waiting for us.