From that point of view, you're right. In Star wars, there's no dimension travel force power. Even God Luke Skywalker couldn't do that. (I've heard that Luke made a Black Hole and throw it to the enemies... But... if it is black hole... The theory will be complicated...) Anyway, if two story universe can be cross-overed, we can discuss the possiblilty. Then, You said that jaden can stop him. But I don't think so. Because Cthulhu has cosmic horror power and can overwhelm everyone except powerful elder gods... outer gods... Although jedi is powerful, they can be eliminated by various tricks and traps, superior numbers, superior tactics. The power of each jedi varies respectively. Maybe Luke, Kyle and Jaden will overwhelm and surpress thousands of soilders. But... What about others? Most of them are about halfway. That's why Clonetroopers could eliminate so many jedi. Excepting council members or other special named ones, Most of them are about halfway. Besides, All gods in Cthulhu mythos are cosmic scale. I think it fits in Star Wars universe because it treats inter-galaxy story(it's legend standard anyway...). The galaxy is cosmic and universe, right? Azatoth is most powerful and lives out of multi-universe demension. In Jedi's point of view, they can be also cosmic horror target. But it's better than normal human in real world. We are all weak human. Jack Walters is also powerless human, too. But Jedi has special powers and can be more powerful by training. The talent is different by each of the jedi. I think they can even confront and maintain the battle for a while..... however they will be exterminated one by one because of them. If jedi combines their power in one, maybe they can defeat Cthulhu and Dagon, but it would be not easy. But what about yog-sotos or Azatoth? What about other Outer-gods? And Cthulhu has sibling and parents and grandparents, too. Therefore, my answer is that. Cosmic horror is always cosmic horror anywhere, The Star wars is not exception of this.