There are numerous such situations; it's a common pain point. The problem with taking it as a business opportunity is that it usually results not from anyone w

There are numerous such situations; it's a common pain point. The problem with taking it as a business opportunity is that it usually results not from anyone wanting to "fill the gap" but rather from licensing conflicts. There have been a few specific examples of companies profiting from this e.g. companies with roots in anime fansubbing who license material then port it to the US shortly after the Japanese broadcast and with higher standards of translation. However, these cases are very rare and usually hinge on the company's ability to negotiate with underserved rightsholders - not underserved end users.