Bethesda has started a live Twitch teaser stream and a Twitter tease of something that has to do with Fallout, driving fans into quite a frenzy and starting the rumor mill.

The live Twitch teaser has been up for quite some time peaking at over 140,000 viewers at one point, but it still did not show anything new except for a TV with the recognizable "please stand by" announcement, and Vault Boy Bobble Head.
A similar teaser has been posted on Bethesda's official Twitter but without further explanation.