Yeah, I wondered what’s he’s sweeping?
Simple, he’s keeping Bond at his sight to monitor him and his plans.
Gustav Graves was a public figure, he’s so famous and he didn’t want any controversial or any scandal that can damage his reputation, now that Bond was there, a man from his past who came back to haunt him (cough, see what I did there), Gustav Graves had no choice but to play safe and invites Bond to the event, because whether he avoided him or not, Bond would still investigate and that’s more dangerous it’s likely that Bond would exploit him, revealing his real persona, so better to keep your enemies with you, than to let the mouse do it’s thing without the cat looking.
About the Miranda’s betrayal:
General Moon sent his son to study at Oxford and Harvard. It was an experience which would prove formative on the young Moon, providing him with the contacts which he would later use; including Miranda Frost who was on also on the Harvard fencing team. He was able to bring Frost to his side by arranging her to win the Olympic Gold Medal in fencing by implicating her competitor for using steroids, that’s the reason why she betrayed Bond, she has a debt because if not for Graves she would not have won that medal, she has no motivation per se, but rather bringing back all of what Gustav Graves done on her, she’s paying it back to Graves, he helped her won the competition and maybe even building a very strong relationship between them after that.
Well about him destroying UK and America, here’s the piece of info I’ve got from the James Bond wiki:
“In reality, however, Graves was planning to use the satellite as a weapon to detonate mines placed along the Demilitarised Zone between North and South Korea. With a path carved through the demilitarised zone, the North - with his backing - would invade the South.”
Well, I’m not sure about Madonna though , she wanted to be in the film, even just a cameo, the music video of DAD has her doing some scenes from the film like fencing
