There are no secret workouts.
The beautiful demigod beefcakes known as Chris Hemsworth and Chris Evans (and for that matter, Chris Pratt) have personal trainers who tailor their every workout to their exact needs. No program. Just different workouts depending on the current short-term goals.
Need a bigger chest? We're adding this exercise to the plan.
Need bigger arms? We're adding that exercise to the plan.
Need to adjust the shoulder-to-bicep ratio? We're adding this exercise to the plan.
Need to do a photo shoot in three days? We're removing these items from your diet.
Need to shoot a topless combat scene next week? We're doing these workouts until then.
Again, they don't have a workout program. They have a group of trainers telling them what to do every single day based on a series of ever-changing short-term goals.
The secret plans
...are bullshit. There are no secret workouts. We know all the exercises. Unless you hire a trainer, you're on your own in the task of putting them together in a way that makes sense for your specific body, and your specific goals. And with some experience, you'll be able to do that for yourself by testing different things and seeing what works for you.
Anyone claiming they have a secret training program is trying to sell you something. Even worse, they're trying to sell you a bog-standard training program that you could have gotten for free by googling "how to [my goals] for people with [my body type]". There are gonna be some bad apples in those Google results too, but every now and then you'll find something that doesn't immediately ask for your credit card info and the deed to your house.