I should have been more clear that finance pros do not all already read SEC filings. Some pay for news services this could replace. Some read the filings manually and would pay a small amount of money to not bother with edgar. They won't get the unlimited-budget firms but they could get a branch manager to replace a $3k/year newsletter with this.
Build out a system that organizes all of this financial information. Make it freely available. Build a pay service around it: top notch, cheap retail brokerage.
What other services could you get investors to pay for if they had all the information necessary to make thier own investment decisions in an easy to use format?