I’m utterly stuck. The hints sort of lean towards Rome but not completely.
The bard is Shakespeare’s nickname, as the greatest storyteller in the English language. “Et tu brute” is a line from one of his most popular plays, but he told tales of other times, other places, not just Rome. Some stories run smack into pre CK2 post Rome time frame. Some are completely fictional.
Did any play from the bard talk a day yet to come, then vicky3 might still be on the table...

j/k
Either way, a story will be told tomorrow of a game yet to come. As long as the game is good, all will be well.