1. Nintendo aren't going to sell the system at a loss, but considering the amount of money they have now I think they will sell it at or near cost. The profit margin on the Wii was huge, so I think at this point they can pack their next system with some good tech without breaking the bank. If the system is successful and continues selling well, then they won't need to cut the price for a while, so they''ll start making a profit as the cost of manufacturing goes down, not to mention the huge piles of cash they can make on game sales if they put out compelling software.
2. Nintendo have had an interest in online gaming since the SNES, so I think they'll have a competent and robust online system this time around. They have just been waiting for online to become profitable and affordable, which it now is.
3. I don't think Nintendo cares much about data storage since it doesn't really suit their own needs. I'm guessing the system will have a bit of internal flash memory (the rumoured 8GB) for firmware updates and game saves, and be expandable with a hard disk, and maybe even support other types of storage like SD and USB sticks. But it won't include anything of the such in the system package.
4. This one is their biggest hurdle. Third-parties don't like Nintendo, and for good reason. They may try to appeal to them a bit more than they have, but they'll always serve their own needs first. And that's what they should do. But at least if the system happens to be in line with what some third-parties want, we may not be without many third-party games this time around.
5. I'm not sure about this one. They might have the money to open/buy new game studios, but it's difficult to find the talent.
6. I'm not sure I agree with this one. Peripherals are usually best served with a handfull of games rather than trying to use it with all future software; does anyone want to control Link with a Balance Board? I say, create less peripherals and make a standard controller that's capable of almost anything. The Wii Remote and Nunchuk come close, they just need some tweaking and more advanced tech and then they'll be extremely versatile.
7. This point is factually incorrect. Nintendo have published several new IPs over the past decade (and the Wii Series and Nintendogs count regardless of to whom they appeal), it's just that most of them haven't received the budget and marketing of Nintendo's established franchises and consequently don't sell nearly as well. Of course, the market is partially to blame for this since sequels currently sell better than anything, so Nintendo is not entirely responsible for it.
8. Nintendo seems to have a better launch for home systems than portables, so I think we'll see something on the level of Super Mario 64 and Wii Sports for this system.
9. This point clashes with courting third-parties. As both a hardware and software designer, Nintendo are going to design their systems with their own needs in mind. Sometimes this matches up with what third-parties want (SNES), and sometimes it doesn't (Wii). But if you want them to continue doing what they do best, sacrifices must be made somewhere.