If MS opens the show with a game, knowing that the main message/thing will be Scorpio, I would think that game would be Forza 7. The other thing, if they do open with a game and it is on Scorpio, usually that tag line that says "All in-game footage", what would be the listed next to it? Since we would no know the new name for Scorpio, would that text say "All in game footage, running on Project Scorpio"?
So, lights go down, Forza 7 engine sounds over the loud speakers, then amazing footage, tag lines mentioned, then Phil comes on stage and says that amazing footage was in-game on [insert name of system] and it will be available on day xx at $xxx.xx price point. Then goes on to show the consumer version of the system and talks a bit more about it. Also mentions that to get a true look for those watching on streams, go to xxxxxx website where we have uploaded 4k versions of all games shown to get a true sense of how amazing these games look on the new xxxxx system.