Just got an email that on February 7 a handful of 360 and OG XBox games will be delisted from the marketplace. Things that caught my eye were Breakdown, Blue Dragon, Orange Box, L4D 1 and 2 and some others. You can still redownload them after they've been delisted they confirm.
https://support.xbox...9B6A7FDA997F4FA
I'm assuming that is just from the Xbox 360 Marketplace, so I would still be able to buy Kotor II from Xbox regular store after February 7th, but it doesn't seem perfectly clear.