Did you know that between 2016-12-23 and 2017-07-05, Science Fiction & Fantasy SE had more Star Wars questions than Harry Potter questions? We can thank this to the popularity of the Disney Star Wars films: The Force Awakens and Rogue One. Force Awakens was what let Star Wars overtake Star Trek on 2016-01-11 in first place. I hadn't noticed any of these lead changes at the time, and Meta doesn't seem to mention them either, which is why I want to document them here.
The above plot shows the cumulative number of questions as a function of time in our six most popular franchise tags: harry-potter, star-wars, star-trek, marvel, tolkiens-legendarium, dc. I use the current set of tags for each question, not the tags as they existed back then. This should be a more accurate description of the questions, especially for the last three tags.