These are Tomy's ideas for the 25th anniversary, open the gallary to see the images. 

Page 1

This is a magazine page with Tomy's ideas for the Sonic 25th Anniversary celebration. As you can see here, it 's mostly art & mock-ups with already used figure photos standing in. The first item is a "Figure 3 Pack with Coin". (The coin is that gray dot there between Sonic & Knuckles) But why use Boom for the 25th?
The STK art right below it is to represent that they will also do a 3 pack with classic figures as well, but since they didn't produce any figures yet it's just art. (The Tails is cute, but his head seems a bit too big)

25th Anniversary Plush set 8 inch size. This selection includes classic Sonic, Knuckles, Eggman & Tails. Since it's just art, it's impossible to tell if these will be any good or not. As everyone knows, plush varies wildly based on craft.

Page 2

This page of prototypes (and released items) claims to be all about 2016, but that must mean things being on continued release because a lof of this stuff is easy to see from here in 2015 like Burnbot & the various zipcord pull toys there at the top of the page.
The "vinyl figures" which are much larger than the others shows them in their package (S & K in the middle there) then reveals the newest one in the lineup that's sure to bring excitement: Metal Sonic! The 4 figures at the top are a 4 pack, which is a new format for them.

The hoverboard & egg o matic are a set, both of which can roll around on a smooth surface to battle. The burnbot entry acknowledges it is a continued release from 2015.

Page 3

This page has more plush news, first off, the first ever Sticks the Badger plush is confirmed on their 8 inch regular doll assortment for 2016. It has Sonic, Shadow, Metal Sonic & Sticks. Each one looks ok here in prototype factory photo form.
The same page has the action Tails plane that comes with the figure that has been released for a while now.
The right page has even more little big-head plush to add to the Sonic/Tails/ Knuckles that were already released. You can see Cubot, Sticks & Metal Sonic (with a Sonic re-release on the line)

The top row has art for even more planned little big head plushes like another Sonic, Amy, Orbot & even Shadow. It's a wacky concept but it seems to be doing well, especially to warrant not 1 but 2 more planned plush line-ups.
The last item is a mini Radio Control Sonic on a rather big hoverboard. This is to scale with their small 3 inch figures so it really is small, making it sort of unusual for an RC item (which are usually a little bigger than usual) You can see its blue controller there & 2 ways he can ride the board.

Page 4

These pages are all about the regular size (3 inch) figures. It confirms Shadow & Metal Sonic with actual photos of the figures. It's nice to see the addition of some badniks too, you can spot the modified Motobug, Eggman's new crab, and "Beebot" down there with Knuckles. It also shows that the 'altered' figures like "war paint Sticks" will be 2 packs with another altered figure like "Oily Tails" and Dirt Sonic / Bruise Knuckles. Notice the "Best seller" sticker here, showing that these small line figures are doing well.

All things on these 3 pages that are not already released in 2015, are slated for spring/summer/late summer 2016.