Metroid 3DS was most likely a Metroid "3D classic" for the eShop never got made. Soul Calibur turned out to be Tekken. Same developer, Namco
And there it is.
Let's give her the benefit of the doubt and assume that she actually had all this information and didn't make anything up.
She said Metroid 3DS is in development. The revised version of this was that it was a Metroid "3D Classic" for the eShop that never got made. Now, who could have given her this information? Well, it'd have to be someone inside Nintendo. If the game never got made, the ESRB wouldn't be involved. If the game never got made, it wouldn't be testing at Nintendo. It'd have to be someone in development in Japan or someone in business development in the US. At best, the information she would have received is "We're considering working on Metroid as a 3D Classic". Which means she did not possess the skills required to ask the right questions of the information, or to report it in an honest way. She would have had to exaggerate a "maybe" into a "definitely" and a "definitely" into a "going to be announced at E3", and would have had to change "considering a 3D remake" into presenting it as a new game.
Or let's say that a third party developer was pitching a 2D Metroid to Nintendo and she got information from that team. It was her responsibility for figuring out that it was a pitch, or that the agreement was signed but it was still early development. Again, she'd have had to exaggerate her certainty to present the project the way she did.
Let's say Soul Calibur 5 was intended to be Tekken. The way to make that error would be if your contact was someone at Namco who said, for example, "we're bringing one of our fighting games to the Wii U". She would have had to assume which one it was. She failed her duty to contextualize the information, and made an assumption to make her information juicier than it was.
So in the best case scenario, she failed at her journalistic duties, whether or not she sees herself as a journalist. And that's assuming she didn't make the stuff up.
Now when you look at the rest of the list, a lot of the stuff is Nostadamus/horoscope stuff--stuff that, whether or not she presented it based on factual insider knowledge, reads like a list of generally agreeable hypotheses that most people could deduce without insider knowledge. Many of those things were common sense; The Wii's time was clearly over, and deducing that Pikmin 3 would be moved to Wii U would be more sensible than deducing that it would be cancelled. Arguing that Nintendo would emphasize western publishers (noted on that list as "correct") is trivially true for E3, but actually incorrect if you look at Nintendo's overall strategy. Ubisoft has never not launched at least 3 titles for a system. etc.
Being a good journalist starts with skepticism and humility. Secure information and report it in a conservative, skeptical way after verification and vetting. You might investigate on a hunch, but you don't report on a hunch.