I think that in order to keep out rumored titles (i.e. it has been rumored for years that Nintendo was making a Kid Icarus game for Wii, but it was never confirmed), maybe you should include sources confirming new games..
A quick skim of various gaming sites over the net and here are some links for your review to try to distill these "rumored titles" you speak of:
Final Fantasy:
1.
Here is a list of games as shown at E3 and posted on IGN. (Dragon Quest is also on the list)
2.
Here is an Interview with Square talking about the potential of porting over Final Fantasy to the 3DS.
3.
Here is Reggie Fils-Aime confirming that Final Fantasy will be on the 3DS.
Dragon Quest
1.
Here is Dragon Quests Yuji Horii talking about the possibility of porting over Dragon Quest to the 3DS.
2.
Here, on a side note, is a news article on the newest Dragon Quest Opening as aired in 3D theaters in Japan (experimenting with 3D are we? Hmmm...)
Hope this helps. This thread was created for gamers to talk about the games they anticipate for the 3DS. Anticipate does not mean confirmed. I have merely listed the games that have been confirmed or talked about by developers on record. If you have something to add to the list, great. Hope this helps.