I'm thinking of special modes/functions M2 would likely put into 3D Power Drift. First they'd come up with something to make the game more accessible for players old and new (those who can't play as well as they used to and those who have grown up with easier games). But I'd love to see an Endurance Mode where you play through each course back to back in various orders (or maybe it would mix up each stage at random, forcing you to keep your wits together and strategies committed to memory). Real question is, would they include this feature if that would feasibly work for the arcade original? Loading in each stage is snappy in Power Drift but only because everything's made of similar bitmaps, and the physics/mechanics are probably loaded into memory during the race countdown.
Odds are we're getting both Power Drift and Tsu because M2's put a lot of work into them and knows there's a vocal, highly receptive (if limited) audience for these releases overseas. None of the arcade game releases have been left over in Japan, that's for sure, and this duo's not the "bonus games" for Archive No. 2.