I’ve worked for two large companies that both went through mergers of equals . It was horrible in both cases. The employees of both company worry day by day what will become of their job. There was at least one suicide.
If you find yourself in a similar situation, leave.
This isn’t a merger of equals. Discover is cheap and swallowed the whale with Warners and is taking on a massive amount of debt that will need to be paid off. Warners is going to get gutted.