Could you go into more detail?
DQ seems no different than say, Final Fantasy.
Dragon Quest
is a lot more complicated than Final Fantasy. Allow me to elaborate:
1. The Final Fantasy IP is wholly owned by Square Enix. They own the franchise by themselves, including all assets from characters, scenario, logos, music and all other material pertaining to it.
2. The Dragon Quest IP is owned by three different companies: 1. Armor Project, which is owned by DQ creator Yuji Horii, 2. Bird Studio, character designer Akira Toriyama's manga studio (also one of the owners of the Dragon Ball IP), 3. Square Enix, the publisher of the game.
Dragon Quest's music isn't owned by any of these companies but directly owned by composer Koichi Sugiyama, who's known to be very strict and stingy with how his music is licensed. Not to mention other controversies surrounding the guy but I'm not going to elaborate on them.
That's 4 parties they need to negotiate the IP with. Hence why it's a more difficult IP to work with in regards to licensing.
Oh, and in case someone brings up Fortune Street, here are a few more details to be mindful of:
It's based off the Japanese game series Itadaki Street, another IP created by Yuji Horii and a lot of these games are spun-off from Dragon Quest. So, the Fortune Street game on the Wii with Mario characters? Mario
is the guest character in it, not the other way around. Nintendo published it outside of Japan, but in Japan, it's published by Square Enix. In other words, Nintendo was the one to license out the Mario IP to the game.
And before someone brings Kingdom Hearts as a potential Square Enix IP. It's not owned by Square Enix. The IP is owned by Disney. Square Enix just develops the games.