According to a leak, DOOM, The Evil Within and Fallout 3 will soon be available in Xbox Game Pass subscription.
Even before the Xbox & Bethesda Showcase, the first games for the Xbox Game Pass were leaked. The Microsoft Store announced that DOOM, The Evil Within and Fallout 3 will soon be subscribed to. Possibly on the Sunday after the show.
Further details will be available on June 13, 2021 from 7:00 p.m. in the Xbox & Bethesda Showcase.