i won;t be surprised if the encyclopedia will be included again. they did it last year, and what better way for new players to familiarize themselves with the story than by reading. (now that’s something new for you, kids!). and a way to get them to buy copies of the earlier games, too.
best bundle for me would be, in order of importance:
1. download codes for bonus in-game content for both 1st day release and future dlc.
2. encyclopedia, graphic novel, comic, or any printed media that further expands the ac story.
3. video disc (dvd or blu-ray) of a short film that again expands the ac story.
4. soundtrack. complete soundtrack.
5. merchandise and/or collectible in the form of shirt (not the ones already available separately in the store), statue, medallion, or replica items.