Specifically, when I say this, it means that the lore will be evolving with every character. You will make a character, regardless of pre-in status, and I will weave them and associated backstory into the pre-existing lore.
Characters may also have unknowing or knowing ties to each other, depending on backstory. You may NOT collaborate with each other on lore unless I specifically give you the go-ahead. At the end of the day, what I say goes.