AEW’s getting ready for a huge show in New York tomorrow night (Sept. 21). Grand Slam — four hours of wrestling which will air on Dynamite and Rampage this week — is a big deal because it’s the company’s annual stadium show in New York City, and because it comes as AEW is trying to right the ship after the chaos that followed All Out earlier this month. Several members of Team AEW are on the media trail promoting Grand Slam this week, and that includes owner/president/booker Tony Khan. Khan’s sticking to his usual promotional strategies. He’s promised Grand Slam…