1 - What phelps said. The agreement between USC and the city of Los Angeles is that they can do whatever they want to the Coliseum so long as they make it available for the Olympics. Again, this means they just spent nearly $300 million on renovations to improve the stadium with little regard for hosting athletics, which will require an additional $300 million for the temporary overlay. I was there for the first time a few years ago visiting a friend in LA. For a building that's nearly a century old, I'm moderately surprised it's still standing. That there's public transportation there helps, so that will be a key selling point during Games time.
2 - Half the ceremonies is not a small deal. Debatable how much Kroenke and his interests will be involved, but now that he's firmly planted himself into the LA landscape, I'm sure he'll do what he can to capitalize on the Olympics being in LA. Remember, SoFi is his stadium. He owns and operates it, as opposed to the Coliseum which is owned by the city.
3 - Depends if it's a new arena or a replacement for the Forum, which right now is slated to host gymnastics. I agree with phelps that I've never been a big fan of the current plan for swimming. Not sure a new arena would be an option if if displaced gymnastics, but it's an interesting theory.