User blog comment:Equillibrium/Elder Scrolls Online Gets Graphic Overhaul/@comment-13446185-20130926220112/@comment-5558140-20130930012159

then your looking at it the wrong way, it has no effect on the lore, you will not be addressing the player as emporer, its a title given when your i guess at the top of a pvp ladder for whatever game types TESO will have, if you want to, you don't have to PVP and you don't have to even see the player who has the emporer title, the name is a purely cosmetic title, the only difference it makes is that it gives players a special skill set.

and i was not comparing TESO with COD, i was using COD as a very clear example of how there is a separation between game modes, and one will likely have no effect on the other. so something that has no effect on the lore is thereby lore friendly. its up to you how "immersed" you really want to be.

and yes, since TESO takes place during the interigrum, for which there is basically a giant blank for the enitre second era, they can and will be making the lore in TESO canon, you can read it right here.