Let's look at the presidential immunity issue. There are several ways the Supremes could rule:
Full immunity. That means that presidents are fully immune in all situations. That's a crazy position, since Clarence Thomas does not want Joe Biden to shoot him. Very unlikely the SC will go for full immunity.
Immunity for official acts: this may sound good, but what happens if an official act is corrupt? For example, a pardon is an official act, but a president might sell pardons, which is illegal.
Immunity for official acts, if they are not corrupt. Again, it sounds good, but isn't workable. If DOJ indicts a president for a corrupt official act, the defense is going to say that the president has immunity. Which means another ruling by the Supreme Court.
No immunity. That's a fairly bulletproof position. I don't know how much, if any, immunity the Supremes will grant a president.