Welp, time for more footage of the Sonic stuff:
Stuff of note:
There's a custom intro a-la Sonic 1 (it's a bit cut off in that vid, here's the best vid we've got of it), and interestingly enough Sonic Team's credited in part for it. Maybe Sonic Team's been more involved in this level pack than we first thought?
Sonic's HUD in the top left-hand corner of the screen literally has 1UP monitors representing the health hearts.
Sonic also does his classic "oh I've been hit" pose when hit by a badnik in the stage.
At 1:50 there's a hidden area in one of the loops with an animal capsule in it. Probably contains a minikit at a guess.
2:25: "You will go through all years of sonic" - Pretty sure they don't mean literally everything, but they namedrop Chaos, Mecha Sonic and Metal Sonic as being in the level. Also they mention that it's gonna be roughly 6 stages in total, which makes sense considering the length of other level packs.
At 2:55 Sonic doesn't just break up into pieces like everyone else in the game when they die: he falls off the screen a-la the classics.
At 3:19 when Sonic gets in the Tornado, he doesn't pilot it - he stands on the wing and Tails pilots it for you. Amazing.
Neat lil' detail: When being sprung about on the springs, all the other characters flail about - except Sonic, who'll flail for a second and then move into his normal bouncing-off-spring pose from the classics. It's the little things that count.
3:36: They confirm that you collect the seven chaos emeralds through the level pack, and by the looks of it Super Sonic has a lot more sparkly effects around him than that last clip.
3:50: There's a giant special stage ring at the end of the act that they mention will take you to a special stage. Sadly they don't show the special stage, but it's neat to know that we're getting 'em.
That's all the stuff I noticed, and oh boy November 18th can't come soon enough.