The union puts out excellent scope summaries. They are rarely posted here because they often conflict with what some posters want to project. A simple example would be all the posts on Aeromexico. I just flew with a pilot who assured me not only had we not added any Mexico flying but were reducing rapidly. He got that info from APC. Here is the most recent update from the union.

Our JV with Aeroméxico recently turned one year old. What has that first year looked like? There has been a tremendous increase in DAL-coded passengers flying on AM metal and a similar increase of AM- coded passengers on DAL aircraft. We asked ALPA National Economic & Financial Analysis to take a look at the growth in year one, and the results show an equitable distribution of the growth in the first year of the JV. By seats, seat-miles, frequencies and block hours, the Delta share of growth across the border was greater than 50%.