dinogorgon

The 3-D printer and mini FXX K (i.e., roller skate) are my favourite details from this set.

Mister Bricks doesn't have a listing for 75880, but other sets are there. As Chimaninja454 suggested, maybe there will be a second wave released later next year.

The decorations on the Bugatti look like stickers to me; there's a definite edge visible when zoomed in. Wonder if there is some sort of legal agreement that if the likeness of the car is used, then it must feature all details in order to make the brand more recognisable. There's also some partial detail visible on the wall element of the SF16-H, which looks like a sticker as there are two different shades of red. I'm interested to see if the backdrop for the podium in the Ford GT/ GT40 will be the same design from the video, or if it'll be the generic black and white chequered motif used before. Does anyone have an idea as to what the mini-build in the Bugatti set is?

Yeah, that's what i was alluding to ;) The 2016 GT also has slightly different colouring to the one we saw in the promo video a few months back.

Not sure if links are allowed, but they're on imgur and Reddit.

There are a few interesting colour choices in several of the sets; particularly the Mercedes AMG Petronas crew that are all clad in red overalls, which look suspiciously similar to the Ferrari team overalls from previous sets.

They're up on imgur and Reddit. Not sure if I can post links as they're not official, but searching "Speed Champions 2017 leak" will get the right results.

Sadly in the leaked pictures the front of the FXX K is directed away from the reader, so we can't see the bonnet, splitter, etc. However, it does show off the brick-built diffuser, exhausts, and fins. The side panels look to be redesigned, and I can't be certain, but it looks like the 1x1 round bricks in the front have been replaced too. The dyno/ wind tunnel looks quite interesting. Definitely want a better look at all that stuff in the background too.

Brickset has the set name listed as "Ferrari FXX K & Development Center." Apart from the new piece(s), I wonder how different the build will be from 2015's LaFerrari?

Looks like the "Mercedes Pit Stop" set has switched set numbers. Maybe we'll still get a fourth solo car announcement, for a total of seven SC sets in 2017 after all. White and green sounds like last years Mercedes F1 W06 livery.

I'd like to see two cars from Bugatti too, but I'm hoping one of those is a late 1920s Type 35. Maybe we'll see something along the lines of the Porsche 911 models; a colour change, and a few minor cosmetic changes to depict the different cars.