http://www.bethblog.com/2015/02/10/bethesdas-first-ever-e3-conference-save-me-a-seat/
So as the Title and link says, Bethesda annouced today that they'll be having there own conference at E3 for the first time this year, on June 14th, so zjust before the event actually starts. Fallout 4 seems to be the most likely, and biggest annoucement, given its been 7 Years since FO3, and 5 since New Vegas. I'd expect to see some stuff about the new Doom Game and Dishonored 2, and yes even stuff on Elder Scrolls Online. I doubt there will be anything about TESVI, but it'd be awesome.