Fallout 4's Deacon aka Ryan Alosio, goofed up a bit today with an inadvertent slip up on Twitter that announced he was working on Fallout 5 which, according to the now-removed Twitter post, is now in pre-production.
This has not, of course, been confirmed or denied by Bethesda but we'll see what the next days bring. Still it's great news for Fallout 4 fans...maybe not so much for Mr. Alosio. Pretty ironic given that no mention of Fallout 4 being in development was made in over five years. Oh well, right?