For example: Art treatment rarity Many Magic cards are printed with multiple different 'treatments'
A deck can have up to nine cards named Nazgl.
If you controlled a Level 5 or higher "Harpie" monster when you activated this effect, you can also add a second such card, with a different name from the first
Banner is called Lyman Banner like in other Tag Force games, Fonda Fontaine now uses it's real name, The Other Yuma now is called Yuma Miyata using her SUB surname (but if she team-up in Story Mode, her name still The Other Yuma), Sora Shiun'in is using his anime name and the main character names are all in the ocidental format, even in the Story Mode or List of Duelists if they are mentioned
There are a few alternate choices for Princess characters
According to that same preview, March of the Machine: The Aftermath (a set of 50 cards showing off what happens following the main storyline) will show us "which characters live, which ones get a happily ever after, and which ones don't live to see the aftermath themselves." Wizards has made a big deal about how March of the Machine will fundamentally change the Magic multiverse, so we'll have to wait and see if that's true come April