Eurogamer understands this rumour to be true, and we've also heard Bethesda will announce The Evil Within 2, Wolfenstein 2 and re-announce Prey 2 during the conference.
The Skyrim remaster rumours originate from reputable industry insider Shinobi602, as well as another apparent insider posting on NeoGAF as Enter the Dragon Punch.
Shinobi602 cautiously mentioned "a remaster of sorts ... for something" during an H.A.M. Radio podcast (via Gematsu). German website GamePro.de ran a story saying it was Skyrim, and Enter the Dragon Punch corroborated the assumption in a GAF thread by saying "it's real".
Monsieur Dragon Punch went on to add that the Skyrim remaster will contain "mods, all DLC [and] improved visuals". Mod support is the key inclusion there - it being the thing that makes Skyrim so enduringly popular on PC. Remember, console mod support is something Bethesda now has up and running in Fallout 4 on Xbox One, and will bring to PS4 later this month.
Prey 2, meanwhile, is thought to be completely different to the Human Head-developed Prey 2 we previewed in 2011. It's believed to have been built anew by the relatively new Austin, Texas arm of Dishonored developer Arkane. Kotaku leaked internal emails about Prey 2 a few years ago. However, Bethesda said in 2014 that the game had been cancelled.
Wolfenstein: New Order 2 we caught a whiff of when the voice actor of a key character in the first game said she was working on a second game in the series.
The Evil Within 2 we haven't heard anything notable about although a sequel is generally expected - the first game being one that went down well. We Recommended The Evil Within in our review.
