No, Laettner didn't get an ABA title playing with Julius Erving's New York Nets or Mel Daniels' Indiana Pacers back in the 1970s.
He is, however, involved with the recently revived minor league ABA. Laettner was a member of the 2011-12 Jacksonville Giants who went 20-1 last season and won the title. Although signed as a "celebrity player", he's nonetheless entitled to the championship ring.