- It's a game news site's "job" to report any news for video games that they find relevant for their audience.
- This is a really cool new trailer, it showcases a lot of aspects to the game the earlier footage didn't, so I can see why it's relevant.
- There's no English equivalent available (yet), but it's a cool trailer, so waiting for a translated one to potentially drop is out of the question.
So there's a Japanese language trailer dropped for a game that's already been promoted in the west using a specific title, and to boot it's a semi-upgrade/sequel to a game that's already popular under that localized title. It would be really weird to not use the title that a vast majority of their audience is already familiar with because the trailer isn't in English.
Having people with an interest in the game potentially miss out on the announcement because they aren't aware of the Japanese title would seem more misleading to me.

Either way, when sharing stuff like this I'd just link the YouTube video, rather than an external article saying the video exists. Problem solved
