Gentlemen
Only the B787 has shown up as a part 121 aircraft. The cockpit socks, as demonstrated by the strobe light at the top of the Vertical Stabilizer, the 747-400 cockpit etc. as per my Father-in Law who flew 777's for a very large American air carrier.
in retrospect, I flew FSX for over 10 years, and had fun doing it although I fly F/O on 767's for a major supplemental carrier.
Can I expect additional large aircraft in the near future?
Samantha