It is certainly possible for Disconnected Rat to succeed in his new quest to hunt Great Orcas, but it will likely be a very difficult and challenging task. Orcas are much larger and more powerful than dolphins, and it will likely take a lot of skill, determination, and preparation to be successful in hunting them. It will also be important for Disconnected Rat to be careful and take necessary precautions, as orcas can be dangerous and it would be important to ensure his own safety while hunting them. Ultimately, only time will tell if Disconnected Rat will be able to succeed in his new quest.