floodgates
From Longman Business Dictionaryfloodgatesflood‧gates /ˈflʌdgeɪts/ noun open the floodgates to suddenly make it possible for a lot of people to do or have something for the first timeopen the floodgates forIf this case is successful, it will open the floodgates for thousands of similar claims.open the floodgates toThis acquisition is expected to open the floodgates to more mergers in this fast-growing industry