Honestly, I wouldn't expect any news whatsoever until E3 or so. With earlier main series announcements, the first trailer has basically said "these games exist", and then we'd go months without hearing anything. Most of the news tend to come in the month leading up to release.I do hope that the nest trailer comes out soon, as we are kinda running out of things to talk about :/
With new generations, they can drip-feed information spread across a much longer time period. Showcase one or two new Pokémon every month, for instance, or revealing a couple of new characters. In remakes, we already know all the Pokémon and characters in them, so there's not much to surprise us with. There will only be a few tidbits of information that would spark the same level of interest (such as the announcement of new features, or maybe possibly new forms), so they're saving those for special occasions.