The hero in Dragon Quest V has the ability to charm monsters, which may not seem new thanks to the torrent of Dragon Quest Monsters games. Back on the Super Famicom teaming the hero up with a king Slime Knight was novel. The preview video shows plenty of that and hints at a brand new feature for the Nintendo DS version.
At the 2:50 mark an image of a woman comes up with a hint that she could be a new bride for the hero. One of the pivotal choices in Dragon Quest V is to choose from two brides. Dragon Quest V DS may bump the number up to three.
Images courtesy of Square Enix.