If your article is very timely (within the last few months), it is likely that few legal periodicals have published about it yet. However, make sure you check major news outlets like those listed below. Sometimes they may provide legal analysis (which could preempt your topic) or spark an idea you hadn't thought of before.
Additionally, you'll need to set alerts and maintain current awareness on developments concerning your topic. Your paper could still be preempted between now and publication, so periodically monitor between now and then. For more on Alerts, please see our Alerts & Current Awareness LibGuide, linked in the side column of this page.