In a tweet on Friday, Ubisoft announced the next Operation coming to Rainbow Six Siege, called Blood Orchid, which will take place in a theme park. It will arrive on August 29 for season pass holders, and on September 5 for everyone else.
Other than that, the information on the new Operation is minimal. A picture released alongside the tweet shows a pretty worn down roller coaster, so it seems that a coaster could be one of the main set pieces of the map.
— Ubisoft UK (@UbisoftUK) August 11, 2017
More information will be announced at Gamescom, where Rainbow Six Siege will be having its Pro League Finals. So stay tuned.