Marvel peaked 6 years ago and haven’t matched that since. I read the numbers that they’ve got mostly a fixed audience worth about $800 million. It’s to be expected that a company with 20 movies in 10 years would have a steady audience.
$2 bil is crazy high for IW. No-one outside of Marvel Zombies cares that it’s (loosely) the build up of previous movies. It’ll be judged by its own merits. And to me it’s nothing like Star Wars either. That $2 billion was down to poor prequels and 40 years of hype. IW is just another Marvel movie. We get one every 4 months these days.