In terms of things people are getting excited about, the remake of Dragon Quest VII has just come out, so if you're into RPGs it's worth a look, although apparently it's slow to get going and very much a case of "if you like that sort of thing". Dragon Quests VI and IX were earlier (re-)releases for the DS and 3DS and you may be able to pick them up fairly cheap if you're lucky.
Luigi's Mansion 2, or Luigi's Mansion: Dark Moon depending on where you live, is a really nice puzzle-action game. If you ever played the GameCube game, you'll know what to expect, but it's a new game rather than a remake.
I got a lot of mileage out of Animal Crossing: New Leaf, so I feel I'd be remiss not to mention it even if it isn't everyone's cup of tea. You act as a neighbour and mayor to a town full of anthropomorphised critters, making friends with them and building up the town, all while earning money to improve your house and wardrobe. Fairly early on, you unlock a nightclub which has a beautiful acoustic session every weekend, which definitely made the game for me.
Other than that, definitely have a look at virtual classics in the eShop once you've got your console. There's some great stuff on there from the NES and Gameboy / GBA, plus the Sega classics already mentioned. I have Mario 3 and Zelda: Oracle of Ages / Oracle of Seasons installed at the moment, along with Kirby's Adventure and the original generation Pokemon.
For gaming news, I like Rock, Paper, Shotgun, but they're PC-only. US Gamer is my main go-to for Nintendo stuff; they tend to be a little over-enthused about anything they like, so I don't insta-buy everything, but they cover more Nintendo stuff than average and the writing is good.