In this dynamic, ever-changing, and constantly modifying cyber environment, predicting future online terrorist threats and challenges is very risky and almost impossible. Yet, at least in the short run, several emerging trends can indicate what to expect in the near future. Online terrorist “chatter” is another source for predicting future trends. For more than 15 years, our research team has been monitoring terrorist websites, forums, chatrooms, social media, and other online platforms. This “chatter” can provide information on terrorists’ thought patterns; their optimal strategies, tactics, and modes of operation; and their true intentions. It can also be a source of learning about desired targets, recommended instructional material such as manuals, and new weapons under consideration. This online information has proved to be useful in numerous cases where attacks either failed or were prevented, as well as in identifying changes in terrorist methods of operation (e.g., the use of “econo-jihad” [Weimann 2009c]), cyberattacks, recruitment of women and children). Combining these sources have helped to develop the predictions made in this part that relate to both future terrorist plans and potential online counterterrorism measures.