While this should come as no surprise given that Apple just updated the AirPods Max in September, Bloomberg's Mark Gurman today said that

In September, Apple updated the AirPods Max, but many hoped a bigger overhaul was coming soon. A new report suggests there may be a wait.

This shouldn't be a huge surprise, as the most recent (and incredibly underwhelming) AirPods Max announcement happened in September. Unless Apple only released the minorly upgraded AirPods Max as a stopgap to get to a more significant release, which is not typically in the company's MO, we wouldn't expect to see a new pair soon.