Everyone that have not set their profile picture will get a randomized Avatar.
If you do not change your picture you can still use it. But once you have changed your Avatar you cannot go back to the previous format. Eventually we will also discontinue pictures and replace fully with Avatar.
You can still change your Profile picture in Edit your Profile, but the Avatar will be shown in Lobbies/Game etc. Whilst the picture will be shown as the Pin on the guessing Map.
More custom outfits etc will be added along the way.