Valve has put out an update for Dota 2 and there's some major changes coming, along with another new hero set to enter the fold.
As part of the 2022 Battle Pass: Part II update Valve announced that NVIDIA Reflex support has been added, and they've said that this is the last major update that will have OpenGL support as everyone will need to be using Vulkan on Linux after that. OpenGL removal was previously announced back in 2021.
For right now though Valve has added Diretide, their annual event with a new Candyworks game mode. This update also comes with a second Cavern Crawl map and the release of another round of rewards.
As for the new hero, they're named Muerta and they arrive in early 2023:
Oh, there's also a little sprinkle of Portal with a Cave Johnson (voiced by J. K. Simmons) announcer pack that had its own fun trailer that even pulled in Valve CEO Gabe Newell. Amusingly, Newell calls himself both "G-Money" and "G-Fat" during it.