Here is a link to the devcom site. Brad is set to be a keep speaker later this month.
https://devcom2017.sched.com/event/BfjO
Unfortunately it is not specific about Pantheon, but the first part "The evolution of game development" could be interesting. Maybe there are a few Pantheon related examples, but I won't bet on this.
Maybe the speech will be streamed here http://theheartofgaming.de or at least there may be a link to a recording. the page may also be interesting for other GamesCom related information.
Sweet! Even if it's not specifically Pantheon-related, Brad is obviously a veteran (if not "the" veteran) in the industry and it's always enlightening to hear his perspective.