The courts generally don’t like it when you run two identical lawsuits at the same time - it’s a massive waste of limited tax payer funded resources. They would’ve likely postponed a hypothetical amazon case indefinitely until after the lawsuit against Apple had concluded (which hasn’t happened yet, it’s still in the appeals process).
After his case with Apple is over, if he wins that case, then he can privately talk to Amazon and try to reach a settlement that doesn’t involve any court cases.