The "protests" of 1967 became the riots of 1968 after Dr. M.L. King was assassinated on April 4, 1968. The riots were concentrated in urban centers. One week later, the Civil Rights Act of 1968 was enacted to outlaw discrimination in housing, real estate transactions and covenants in deeds. That was the last major piece of legislative infrastructure in the movement to outlaw segregation. The unrest continued into the summer, but there were no riots after RFK was killed in June. Unrest came back during the Democratic convention in Chicago, but was relatively isolated.
Yes, there was talk of what the upcoming years would be like if the trend continued. But by 1969, enough goals had been achieved that the remaining protests were against the Vietnam war. Protests had moved from poor, urban centers to university campuses. They let up when the selective service eased up on the draft.
All of the unrest was disorganized. There was no close-knit unity.