They showed a teaser timelapse of the new studio, and it obviously doesn't show much, but don't be surprised if some general concepts carry over from Times Square. You get an idea of the size of the space in the first image. It's apparently the same size as The View's and Live's studios, but should feel even more open with no audience risers.
In the second pic, you can make out wood-tone beams across the ceiling, a large, possibly L-shaped video wall to the left, and a curved desk against a video wall in the foreground. The desk looks like a stand-in for the final product, but it's thankfully a lot smaller than the outgoing model. In the back corner, you can make out some kind of non-video wall feature, though the short end wall (top right) is likely to be a giant screen.
In addition to Charlie Gibson voicing a new team promo as the 50th anniversary festivities start to pick up, Diane Sawyer is likely to be in-studio on Monday, promoting a new sit-down interview she did with an actor.