Looks like Mattel is going to release a new set (ref hwml4760).

Does anyone have an idea if these are new cars or jump repainting of
old ones ?
Mattel having the license of all Ferrari model cars, it would be nice to
see a new body....

I've been thinking the same thing. They could be reissues of their Ferrari F50, F-1 Indy Style Cars or a new mold. I am leaning towards a reissue but something new would being the Ferrari collectors and slot car collectors together.

Here is the picture:

http://ec1.images-amazon.com/images/I/41LvsOYwwVL._SS500_.jpg

Not slots then.