What I think happened after the film's ending

They ALL knew she had a twin sister, but none of them had ever MET Helen in person before.

Moreover, it's clear from the start that these people aren't the brightest bulbs, hence Birdie (Kate Hudson) only "figuring it out" after it had already been explained to her in detail (she also thought “sweatshop” meant “place where they make sweatpants”).

That's part of the gag -- that these supposed "disruptors" are all actually simple-minded posers who were lucky enough to ride Andi's genius to success.

And Miles wasn't baffled at all by Helen's appearance. He knew EXACTLY who she was, because he'd already killed her sister.

But Miles couldn't say anything without exposing himself. Here's Helen, looking and acting exactly like Andi. Anyone calling her out as Helen would draw suspicion as Andi’s killer. How else would they know so immediately?

That said, watch their interactions -- they play differently once you know the "secret." Miles is gobsmacked at Helen’s appearance — Norton literally plays it like someone seeing a ghost.

BTW, Miles invited Andi to the island because he invited ALL of them to his retreats. He did so this time fully expecting Andi NOT to show up just to rub her nose in her court loss. What Miles didn't count on was Andi, raging at his invite, accidentally discovering the original cocktail napkin.



BTW I've had this experience myself, in college, getting snubbed by a friend and only hours later realizing it was his identical twin visiting from another college. Where my friend was an outgoing social butterfly, his brother was introverted to the point of being antisocial. But their appearance was absolutely identical.

Except for the part where they destroy one of Earth's great artistic and historical treasures, of course.
And where Miles charges them with arson and attempted murder.

That was the point of the elaborate and theatrical revenge (and destruction of the world's most famous painting, I guess that's just their collateral damage). They couldn't convict Miles, but they could ruin his company and his reputation and cost him billions.

The Louvre would not have rented the ML without insurance, so Miles is covered there also. The film is not nearly as clever as it thinks it is.

Helen would never file a lawsuit because the company was worthless by the end of the movie. Miles poured all of the company’s resources into the hydrogen fuel concept then it literally and figuratively blew up in his face. I’m sure truth about the napkin would be revealed in testimony during Miles’ murder trial anyways and that’ll be enough for the court of public opinion

I think it’s probable that there’s a lot of evidence for Andi’s murder. Once the police arrived at the Island they would treat the accusations the group hurled against Miles seriously. Suddenly Andi’s death is investigated as a possible homicide. It’s very possible that he left DNA evidence at Andi’s house. He had to pick her up, take her to the garage, and then place her in the car. Then he searched her house for the envelope. Even without DNA evidence, he was stupid enough to drive his one-of-a-kind Porche to commit the crime. So investigators will start asking neighbors if they noticed the car that day, maybe even the general public. He’d get picked up by dozens of cameras on his drive from NYC to her house, maybe a neighbor’s security camera too. His car might have GPS history that he forgot to clear. There’s also copies of the fax Lionel sent him at his other properties. Since Miles got to Andi’s house so fast it’s also probable that he has a prescription for the sleeping pills that were in Andi’s system. Blanc made a point to declare Miles an idiot, so I’d expect many careless errors.

Financially, Miles is completely fucked as well. Aside from his legal bills and his worthless company, he is most certainly on the hook for value of the Mona Lisa because he installed an illegal override switch to the case. What’s worse is he’ll forever be known for installing the switch and burning the Mona Lisa. Nobody outside the group would know that Helen was actually the one that burned the painting, and Blanc was smart enough to deliberately avoid witnessing that.