http://www.gamesas.com/topic/1436018-fallout-4-announcement-teased-by-threedog-voice-actor/ original thread with number 2 being found ...
http://www.gamesas.com/topic/1436277-fallout-4-announcement-teased-by-threedog-voice-actor-2/
By the way, anyone else find it funny that some places are refering to this as Fallout 5? If they want to apply the logic that 4 is New Vegas then technicaly were actualy up to Fallout 6 or 7.
heck if they realy want to they (Bethesda)can just ignore the number bit alltogether and call it Fallout (insert name here)