Japan has already released the physical package of the two games under the title of Famicom Remix 1 + 2. The Famicom, or Family Computer, is the Japanese version of the NES.
Right now both games are only available in North America by downloading them on the eShop. They both cost $14.99 each, though the first NES Remix can be downloaded for free if you managed to achieve Platinum Status with Club Nintendo.
The NES Remix series allows players to take a new approach to some classic games. Some of Nintendo's most prominent series are featured in the game, including Mario, Donkey Kong, The Legend of Zelda, Kirby and Metroid.
Of the two games, I have only had the chance to play the first one. While fun, I was left less than impressed with some of the content. NES Remix 2 did address one of my issues, which was the lack of representation by the Kirby and Metroid series.
With that said, a physical release that combines the two games would provide a ton of content and if it is reasonably priced, it may be worth picking up.
The game will be titled NES Remix Pack and according to IGN it is set to be released during the upcoming holiday season for the Nintendo Wii U. No price is set yet, but it is hard to believe it will top more than $30, which is the combined price for the two games on the eShop.
You can check out my Review of NES Remix 1 as well, which gives some insight on both the good and the bad that the game has to offer.