latest edition of The Elder Scrolls Online's Ask Us Anything series is live on the game's official website. In it, you'll find a focus on Cyrodiil and PvP, as the well as the answers to questions about fast travel and sweet rolls.
In terms of PvP, one thing to note is that zone level scaling will bump everyone up to max level (50). ZeniMax says that "you'll be able to remain competitive, but a true level 50 will have the advantage of having more skills and abilities than you."
There's also a bit of info on layers and channeling in TESO, including answers to questions about gameplay choices and how player actions will affect the ability to play with people who make different choices.