"Yep - Silverstone Pack will include the 1975, 1991, 2001 and 2020 versions of the track, all period accurate!"
"I think you´ll find plenty of tracks that are used for GT3/GT4 racing already in the sim :) The larger batch of cars is looking likely for the late September update (there will be major updates at the end of every month at least for the next year)."
"Trying to gather a little more Argentinean content to keep it company... It will come, no timeline for it yet however."