Wow, coincidentally I was just thinking today, "What if they remade Golden Sun 1+2 into a one DS game?". However, I immediately cast the thought away, because without GS 3 we can't judge how well can they port and change it into a more 3Dish game and I was afraid that they could ruin it. The GS GBA graphics are absolutely wonderful and I wouldn't like my cherished memories to be spoilt by a not-so-good remake. I wish more games would be so graphically nice and story+systemwise great.
EDIT: Oh yeah, and I hope they would remake Breath of Fire, because I thought the game was really horrible, it was hard to tell where you had to go next, you could easily overlook one item (boomerang for me, for the tent guy) and look for hours trying to find a way how to advance further and the graphics were not always so pretty. So why would I want a remake of a remake? Because the story was interesting and the battle-system could have been excellent, so if they just remade the way you advance the plot (so that you don't get lost), upgraded the abilities (like the Dragon transformations and so on, that everyone could be useful and it would be so flexible like in GS) and improved the graphics, but not change them into DS 3D, just make them look better.