Writer Robert Kirkman gave an interview with Comic Book Resources concerning the recent issue of Invincible. When asked about the graphic rape scene depicted in the comic, Kirkman answered:
It’s definitely a hectic time in Mark’s life, there’s definitely a lot going on with Robot trying to take over the world, and I’m just trying to throw Mark Grayson — the main character of this book — into the worst possible situation he’s ever been in so we can see where he comes out on the other side and whether he manages to retain his sanity in the process. We’re really putting Mark through his paces.
Also, it’s just another attempt to bring something that’s a bad part of real life into a superhero world and analyze the ramifications of something like this happening to someone in superhero comics. It’s a great medium to be able to deal with real-world issues against a fantastic backdrop that is completely unreal and see how those differences in the situation change how characters behave. It’s really all about exploring Mark’s character, and I can say it’s a very hard scene to read, and it’s meant to be that way. There will be far-reaching ramifications coming from this moment that will extend throughout the life of the book for years and years and years. It’s definitely a huge turning point in Mark’s life and it’s something that’s going to temper almost every scene with that guy moving forward. Issue #110 was a monumental issue as far as the run of the book goes.