Star Wars: The Bad Batch episode 2 subtly sets up one of the Empire's most dangerous superweapons. The Empire always had a thing for superweapons; the bigger the weapon, the more damage it could do, the more eager the Empire was to develop it. Star Wars Legends featured a famous diatribe from Han Solo in which he mocked them for this, suggesting they'd have responded to an alien invasion of the galaxy by building a genocidal machine called the Nova Colossus or the Galaxy Destructor or the Nostril of Palpatine or "something equally grandiose... And you know what would have happened? It wouldn't have worked."
In terms of canon, the Empire has been responsible for ferrying funds to a wide range of superweapons. They worked on the Death Star for decades, and began construction of Starkiller Base just a year after Palpatine took the Imperial throne. The Emperor was so enamored with superweapons that, according to tie-in comics, he'd begun work on the Sith fleet of planet-smashing Star Destroyers on Exegol well before the events of The Empire Strikes Back. And these are only the ones we know about; Rogue One: A Star Wars Story referred to a number of other projects - Stellarsphere, Mark Omega, Pax Aurora, War-Mantle, Cluster-Prism, and Black-Saber - that could well be other superweapons.
Star Wars: The Bad Batch subtly sets up another of these superweapons. Episode 2 is set shortly after the establishment of the Empire, and Clone Force 99 are shocked to learn the Empire is requiring every person to get a unique identifier known as a chain-code, keyed to their biometrics and containing key information about them. Palpatine understood that he needed to maintain a tight grip on the galaxy, and thus he would need to be able to monitor everything every person did.
But this was also necessary groundwork for another Imperial superweapon. Alexander Freed's novel Victory's Price revealed Palpatine had a massive computer database constructed on Coruscant, stretching underneath the Imperial Palace all the way to the Verity District some miles away. This computer system monitored every single individual in the Empire, carefully assessing their moral state and cataloguing their every decision. The Emperor desired to consolidate the reign of the dark side by creating a political system that encouraged self-interest and corruption, and he used this database to monitor his success. Worse, he was able to identify key people who could be of use by assessing their behaviors and carefully orchestrating events in their lives. It's a stunning concept, and it would only be possible under the most intensive surveillance state.
The key to such a superweapon? You need every single individual to be given a unique identifier, one they are required to use as many times as possible so they're easy to keep track of. That identifier, clearly, is the chain-code introduced in Star Wars: The Bad Batch episode 2. Clone Force 99 had no idea just how intrusive those chain-codes were really going to become.