Well, here's the supposed leak. A lot of these are obvious: London, Berlin, and Merry Mountain remain unchanged, Peach Gardens is taking the slot previously held by Waluigi Stadium, the Saturn logo seems like an obvious fit to 3DS Rainbow Road, and the Rock is almost certainly Rock Rock Mountain.
As for the remaining two, I dunno. The coordinates lead to Cascade Summit in Oregon, which could maybe be DK Summit? As for the Acer one, I have no clue. Regardless, it seems like GBA Boo Lake and GCN Waluigi Stadium got the boot, assuming this is legit (which it very well could not be).
EDIT: Acer is name of tree genus that belongs to Maples, so that would almost certainly be Maple Treeway, which would in turn likely rule out DK Summit as that second track.
EDIT 2: Moving up a bit from the coordinates, you can find Boo Boo Lake, which means that GBA Boo Lake made the cut after all. In other words, only GCN Waluigi Stadium got cut for Wii Maple Treeway.