If it's a fake, it's an exceptionally good one. The added characters' pictures line up properly with the others, both in terms of alignment and direction, the characters don't look partially imitated (the water dragon could have been a recolour of Yoshi, but it's subtly different in shape), and the fact that Diddy wasn't just thrown in where the Mii symbol had been or anything.

And the background doesn't appear to have any artifacts due to the edit necessary to remove the line, or due to the recolour necessary, etc. As for the list of characters, it's a good spread, covering various games within the universe and not using anything particularly unrecognisable.

I'm not going to say it's real, but I could believe it to be.

That's exactly what i thought. Let's hope for it to be real ^^

Source? It would be more believable if one of the new characters was selected.
Alternative outfits for Rosalina and a golden bike with inward drifting are the only things I need.

God dammit, who placed fucking Birdo right next to Toadette? Disgusting.

DLC for Mario Kart wold be so cool. I don't see why Nintendo never took the chance to make some extra cash by putting in some DlC for on of there most popular games on the Wii and now that Mario Kart 8 is quickly becoming the best selling Wii U game adding DLC just seems like a no brainier.

Also YESSSSSS if this is true Brido will be returning!!!!! Hope its legit.

I know right Toadette is totally cramping Birdo's style.

We are mortal enemies.

Diddy, Kamek, and E. Gadd? That's all I really thought was missing from this game. And the extra five characters total make the Koopalings and Babies seem like less of a burden.

As for the dinosaur thing from 3D World... I guess if Honey Queen could fit in a kart, so can he.

I was actually hoping it would be free DLC. Partially because I'm an optimist, partially because I'd be outraged if I had to pay extra for Diddy and E Gadd instead of the babies.

Added another 2 pictures