I can answer generally because I'm not sure which NLP algorithms you are analyzing (metadata, etc). First, you must identify the target audience for your possible new offering. You may already have this. If you do, then the best way to find out what the market wants is simply to ask. Unless I'm missing something, I don't see the mention of a particular vertical or target audience in this post, so I'll make up an example.

Let's say you are targeting criminal lawyers who want to have real time information on crimes and crime statistics using the model you describe above. Develop 10 questions you would ask this group - then ask them. You can do this online, through social media or some people are comfortable picking up the phone and asking the questions "old fashioned" style.

Once you have identified this audience and gotten some feedback, you can then begin to understand if there is a "gap" not only which the industry might be facing, but for which they will pay to close.

Hope that helps.
Stephanie