I'm really concerned about the color scheme shown in the countdown. I don't know if the color scheme of the countdown's just for show or a foreboding sign that the NewGrounds main colors will not be black and orange, but perhaps mixes of gray and green....
I think that would perhaps be the most significant shift if that does indeed happen, above all other changes, as certainly a lot of us have been use to the relationship between black & orange and Newgrounds.
Above anything else, I do hope the portals, namely the audio one gets some real love in the redesign. I think that particular part of Newgrounds needs a better lift than anything else. Also, zero-bomber control.
The whole countdown thing feels rather creepy and full of F.U.D., but I'm anxious to actually be around to witness firsthand a transition to a new age of Newgrounds, be it awesome or backwater.
Best of luck, some dumb kid!