But plans for the showcase are "still fluctuating"
This new comment comes from Klobrille, who has a storied record of leaking Xbox-related announcements ahead of time. Over on the Xbox forums, the leaker claimed that current plans have Xbox showcasing five brand new, AAA games at E3 2021 next month in June, although Klobrille is quick to add that plans are very much "still fluctuating" and anything could change between now and then.
Note that, according to the leaker, these five announcements include games surrounding both Xbox Game Pass and Bethesda Game Studios. Of course, Bethesda was purchased last year in September 2020 by Microsoft, with the deal being finalized earlier this year after being cleared to proceed by the European Union.
Right now, there's no indication as to what these new games could potentially be. Klobrille doesn't name any particular game in particular, but the leaker specifically mentions that Bethesda-related games are included in the five new titles, so we could be about to see a brand new game from either Bethesda Game Studios or a studio owned by Bethesda, like Tango Gameworks or Arkane.