It is possible that the upcoming Playstation Showcase event will be released before the E3 event

 The Playstation Showcase event will be a great support for the PlayStation 5, especially since the games that the event will contain are the most anticipated games, and now we get news that the event will take place before the E3 event, meaning that the possibility of its release in the month of May is possible.

and this is all that the journalist Jeff Grubb of Games Beat mentioned. 

Important note: All this information is still only in the realm of rumor only with time we will see whether it is true or not