The Tale of Amatsu no Kuni and The Battle of Amatsu no Kuni are the only expansions where all cards added were based on the Ōkami and Sengoku BASARA series.
Dragons of War is another expansion which only features cards based on the Breath of Fire, Monster Hunter and Mega Man series.
Starting from Ace vs. The People, every subsequent expansion did not add a new Hero.
Island of Fear was the first expansion where a cinematic trailer was not released to promote it.
↑PlayTEPPEN on Twitter: "A few hundred years ago.... God VS Dragon The War Begins！ An invasion by Goddess Myria's army！ The Riders stand up to protect the dragons New Card Set "Dragon of War" 6.25.2021 PDT (Fri) TEPPEN HEADLINE #8 Live at 12PM #BoF #MonsterHunter #MegaManX " / Twitter
↑PlayTEPPEN on Twitter: "Eradicate the fear springing up from the darkness. Huge, enlarged nails suddenly draw close! The game of murderers and resisting survivors will soon begin. Escape the Island of Death... New card set! 8/27/21 11:00AM PT #TEPPEN HEADLINE # 9 New #Card reveals day and night" / Twitter