The Marvel’s Avengers beta release time and date for the beta access changes depending whether you pre-order and what platform you get it on. The beta program kicks off from August 14 to August 16 on Xbox One for those who pre-order Marvel’s Avengers on the Microsoft Store.Then an open beta event will run from August 21 to August 23, giving players their best look yet at this upcoming superhero game featuring some of the most iconic Marvel characters like Iron Man, Captain America, Hulk, and others. Related: Datamine of Marvel’s Avengers Beta Reveals 15 Unannounced DLC Characters. Every beta … This weekend sees the PS4 closed beta … It will begin on Aug. 21. Marvel's Avengers will host a preorder beta, followed by an open beta. These are only available to PlayStation players at first, extending to Xbox and PC players a week later. It is an open beta for PS4, Xbox One and PC. This is the third and final announced beta for Marvel’s Avengers.