I just did
Have you considered there might not be any trailers to watch? Movies aren't made over night, and they probably have barely come up with a concept yet?
The whole "New movie will be about Yoda" is, as far as I can see, nothing more than a rumour going around currently, so nothing's set in stone at time this, besides that there will be more Star Wars themed movies.
Any information about this that I bothered to find was this: Oh hi, anything else will probably be properly announced later on in the process.
Anyway, for the whole thing itself, Disney is not knows to mess around with their bought franchises, they did well with Marvel, after all, and considering the vast majority of the audible Star Wars fan base is mad about any- and everything and throws a fit if Lukas as much as blinks, it doesn't seem like anything will be good enough to them anyway, so we might actually get some enjoyable films for the rest of us...