I made these, so we can keep track of some things about NSO and the currently available systems on the service;
Likelyhood of some of these games to return are always a tad higher than any other, even though some licensing may have changed between the last time they were rereleased and now (NES Play Action Football comes to mind); Interestly, in the Famicom 40th anniversary site, Yoshi's Cookie page mentions Nintendo as the
only copyright right now. Me and
@MondoMega were discussing other day the possibility of Nintendo solving the license of this one. We'll see!
* also, technically, the Pokémon Red|Green ROMs that were released in the Japanese VC on 3DS are distinct from the Red|Blue ones that were released internationally, but I simplified on the image above.
These obviously have some roadblocks, being attached to peripherals (R.O.B. or the N64 microphone), and some in some legal limbo like Uniracers, but I still tried to be selective and exclude some that are not only unlikely, but I'd say impossible like Popeye on NES or the Ken Griffey Jr. games. I also didn't account for Satellaview titles, but that's just the pessimist on me.
Some considerations here are Rad Racer, since it's a Square game, may or may not show up... and the Game Boy 007 game could still very well happen, since they untangled GoldenEye, which is probably the hardest part.
and finally, a section all about Rare; -- I also went a bit selective on their back-catalog, since there's some attached to licensed IPs. But I also can't say for certain if the ones I picked are safe for a rerelease. I left Battletoads & Double Dragon amongst them, because Arc System Works are already part of the service with their own titles.
There's some redundancy in all of these, yeah.. but if we can have 3 different ways to play Super Mario Bros. 3 on NSO, I'm not sure why we can't have 2 or 3 versions of Snake Rattle 'n' Roll. ;P