There is some huge news circulating like Hamilton is going to sign for Ferrari for 2025 season.
The source: https://www.motorsport.com/f1/news/hamilton-set-to-make-shock-switch-to-ferrari-in-f1-2025/10571247/Maybe this is why Ferrari haven't signed a new contract with Sainz yet. He is in his last year now and he is reported to be trying to sign a 2-year deal. On the other hand the Hamilton news are spreading very fast these days. Hamilton actually has 2 more years left on his contract with Mercedes. But maybe he has fed up with the team and he is looking for new adventures.
Do you think it would be good to have a duo like Leclerc - Hamilton at Ferrari? Even the thought of it is enough to make me excited!

So, it looks that we may get official press release already today, it's only matter of time. I read that Toto Wolf already confirmed news about Hamilton on Sky Sports News.
Very unexpected, we all thought it's going to boring off-season

. Hamilton to Ferrari, I didn't expected that one day I will see such thing. While Sainz is going to move to new Sauber/Audi project.
11 teams with 22 drivers is enough for F1 because it's a car race. it's different from motogp which races motorcycles that are not big in body when compared to cars. the more cars on the track the competition becomes less exciting. because fast cars like redbull become more and more without opponents and it's very easy to win the title. andreti is not a manufacture or car company like honda, ferari and more.
Andretti weren't accepted just because other teams don't want to get another competitor and share prize money with them. After all, this team have long history in multiple racing series and they would come to F1 with bigger ambitions than Haas for example.