My first thought was that it WAS Gravity Falls, and "Oh, what are they doing with it now?"
FWIH, the Gravity Falls look is supposed to be the new "Cal Arts style" that young animators are learning, and still no explanation of why.
"The Beatles sneak peek", btw, is for Peter Jackson's "Get Back", which, like Disney & Fantasia 2000, was originally intended to be a permanent authorized extended-recut of "Let It Be"--one that Sir Paul approved, where there's less breakup-bickering and more of the fun jam sessions--but there turned out to be enough usable footage for an entire separate movie.
So, now that Paul has his fair-and-balanced Equal-Time version of events, there's rumors it's finally going to be released in a double-feature disc WITH Let It Be when it hits Blu-ray. And about danged time, too.