It is difficult to say who the favorite for the Rugby World Cup is as it depends on various factors such as team performance, player injuries, and overall tournament dynamics. However, traditionally strong teams like New Zealand, South Africa, and England are often considered favorites due to their past successes and strong rugby cultures. Nonetheless, rugby is a dynamic sport, and any team has the potential to emerge as a surprise favorite or underdog in any given tournament. Ultimately, it is the performance on the field that will determine who becomes the favorite for the Rugby World Cup.