I was investigating roster files with REditor, and noticed in the teams table a value called TType, I assume is team type and the values for the D-League teams are 6 and 7, I guess for each conference.
I can't change those values, so anyone with a full version of REditor could change them to 10 or another number and test if the D-League teams appear in Quick Game?
If it works, Kova has a very complete D-League roster, but only for association. We can duplicate that one and use it for quick games only, just like the additional vintage teams.