MultiVersus has yet to see an official release, but the game can already be tested as part of an open beta. However, before you can start battling as Batman, Shaggy and Bugs Bunny, you will need to create a WB Games account and then link it to the game. You can find out how to do that here.
MultiVersus - how to connect WB Games account?
After downloading MultiVersus you should simply launch it. The game will tell you to enter your age, and then an important panel will appear before your eyes. On the screen you will see a notification that in order to play the game you must have a WB Games account.
From there you will be able to quickly set it up and plug it into the game. You have two ways to do this. The first is to click on the "Visit Website" button, which will automatically open your browser and take you to the website of WB Games (you can also access it under the address account.wbgames.com/device).
You can also scan the QR code visible on the screen with your phone, which will also quickly take you to the said website. Regardless of the method chosen, after a while you should arrive at a page that will ask you to enter a code of 8 characters.
You will find it on the panel displayed earlier by MultiVersus. Input the code, making sure you don't get any numbers wrong, then send it in. If you encounter an error, generate a new code. Just click on the "Refresh Device Token" button in the panel in MultiVersus.
If everything went well, you should see another page, where you will be able to log into an existing account or create a new one by selecting "No, Create a New Account".
You will then go through the standard registration process. You will have to enter your date of birth and email address again. You will also be able to choose your nickname.
The last step, in turn, will be to provide information on which platform you intend to play MultiVersus. This question will only appear if you created an account on an external device. If you are playing on a PC and created an account via a browser, it will automatically detect your hardware.
With this, you will have complete the registration and account connection. Nothing will now stand in the way of launching the game and throwing yourself into battle.