User blog comment:The Rim of the Sky/New Reveals at E3/@comment-23.115.232.226-20150618133405/@comment-4984687-20150619065841

Between Oblivion and Skyrim, it took 5 years to announce Skyrim. Since Skyrim's announcement, it's only been 4 years. It will likely be at least 5 years to announce TES VI, and it also took 7 years to announce Fallout 4. Announcing both games in the same year would be too much, and announcing a game to early would result in a rushed or unfinished project. Legends won't delay TES VI since a different company is developing it.