The Royal Canoe Club reports that in November 2013 the Intl Canoe Federation voted to drop the men's sprint K2 (2 person kayak) & men's slalom C2 (2 person canoe) events to make room for women's sprint & slalom C1 (singles canoe) events for Tokyo 2020. The ICF never publicly announced this, though they did announce they would propose 2 women's canoe events to the IOC. http://www.sportscene.tv/flatwater/canoe-sprint/news/icf-to-drop-mens-k2-200m-from-olympics
The IOC established caps on the number of athletes & events ("quotas") on all Sports. There is no indication these quotas can be exceeded. Events must drop for events to be added.
The 2012 Olympic Canoeing (or Canoe/Kayak in layman's terms) quota was only 330. Similar multi-discipline/multi-equipment sports like Cycling & Rowing have 530 & 550 athlete quotas spots. Our Sport is woefully under-represented. Tough decisions.
Women's Canoe - Ready4Rio. But we wait for 2020.