The next step in the research/writing process, once you have narrowed your subject, is to pose yourself a tentative research question.
Sample tentative research question:
"Does the portrayal of Ebonics in the media lead to public misconceptions and unfair negative value judgements about African-American dialect?"
Having posed yourself a tentative research question, your next step is to engage in focused research that will reveal to you whether or not ample, accessible, and credible information exists to assist you in answering that question. If you cannot find information to assist you, you may have to reconsider your narrowed topic and formulate alternative research questions.