I think that it is definitely possible he was intending to work on that project, but the incident made me think he must have been planning to release them to the public.
Aaron Swartz and the Internet
Michael Anagnostakis

It would have been so interesting to see what kind of meta-analysis he could have done if he had been able to do work on JSTOR in the same way he had worked on Westlaw. We’ll never know if he intended to do it, but his “freeing” of that database would have made it possible. See also the recent court decision on the Google Books fair use case — maybe his downloading and meta-analysis could have been considered a transformative use of the database.