Thanks to Masusder we discovered the audio files related to the events of the new Anniversary Event and also a new code about the cross-progression.
ANNIVERSARY EVENT AUDIO These audio files refer to events which can be trigger during a match, so for example when you took the crown, or when you were near the crown etc.
The last two should be the audios that you will hear when you complete a generator and confetti will break out.
CROSS-PROGRESSION CODE In the game files these codes have been found that refer to cross-progression,therefore the possibility to continue your progress in the game even from different platforms.
CROWN PILLAR RENDER
Thanks to Benj we have two render of the crown pillar which will be tied to the Anniversary Event: