I hope the music will be played by a big band, but considering that it's basically an entire soundtrack and that the DLC costs 25 eur, I'm afraid they might not want to invest that much. On the other hand, their investment in Deluxe was minimal and the return gigantic, so who knows.
I don't know if we'll get big band. They haven't did any new MK8 big band music since the original DLC, the battle courses added in DX don't seem to be a live orchestra
Based on Coconut Mall, it seems they at least remastered it a bit (like they did for Grumble Volcano and Wario's Gold Mine). But other than Moo Moo Meadows, it's hard to tell if we're getting new music because the other Wii songs in 8 weren't really huge remakes. And the three Tour songs are probably alright, not much different than the other songs in MK8 that aren't necessarily orchestrated. Sky Garden will probably be the test because the GBA sounds are... not... good... and other than that is just remasters from Tour or DS which sound okay I guess, but it'll clash with the rest of the game
I also wonder about Luigi's Mansion, Luigi Circuit GCN, various SNES and GBA circuits, Waluigi Pinball and Moo Moo Farm that all share music with base game stages if they'll just re-use the ones from 8 or if they'll redo them or if they'll just rip the versions of those songs from tour
