World Tour: International Incident is the 16th Smash Up set. It contains 4 new factions, 8 new bases, a rulebook, and VP tokens. Unlike other sets, this also contains a World Tour VIP Backstage Pass, which you can show at AEG's booth during various gaming events of 2019 (GAMA, Origins, GenCon, Essen, etc.) to get prizes such as previews for future sets, foiled cards, Smash Up pins, patches, etc.
Combined with all previous sets, there are 68 factions and 136 bases, which make 2278 possible pairs of factions.