Just like the first two before it, Sega have announced via the Japanese magazine Famitsu that they will release a 3rd retail compilation of the 3D Classics games on 3DS. So far we only know of five games (all of which are already on the eShop) and will only be released in Japan at the moment. See the list of games below.
Sega just announced that they are releasing the Sega 3D Classics Print 2 collection for 3DS they released in Japan last year for NA. This contains 9 games (all listed on the official website) which are; Power Drift, Puyo Puyo Tsu, Fantasy Zone II W, Sonic 1, Thunder Blade, Galaxy Force II, Altered Beast, and also the 3D Master System games Fantasy Zone II and Maze Runner. Though not confirmed to be in the NA collection, the collection also featured the Master System version of Fantasy Zone 1 as an unlockable game in the Japanese version, so hopefully that is also included here.
The 3D Classics release of Power Drift, Puyo Puyo Tsu, and the two Master System games are being released in the west for the first time. The box art for this NA release is also based on the 2nd pack featuring artwork by none other than the artist of Pokémon, Ken Sugimori.
Sega also released screenshots of the collection:
The pack will be available at retail and the eShop on April 26th, 2016 in NA for $29.99 USD and $44.99 CDN.