There are other very real concerns with this petition, including the obvious issue of whether this petition is just a publicity stunt or an actual demand that Nintendo remove Super Smash Bros. for Wii U from sale. It’s the latter that has generated most of the responses.
This petition doesn’t necessarily mean that Nintendo would support the petition. In reality, my understanding is that Nintendo does not currently support their own Wii U platform for these games on a title-by-title basis because it needs dedicated systems like the 3DS to do full games. If this was a demand to just have the console’s titles available on the eShop, then that may change, but it’s not at all likely. The petition has not come anywhere close to being signed by enough valid Wii U owners for Nintendo to actually alter their stance on online play of eShop games. But at that point, they would risk losing the game’s potential. Nintendo knows they couldn’t simply change this right now. Super Smash Bros. for Wii U, however, would likely change that. In fact, we know this from a number of other things, so I wouldn’t be surprised if we could see changes in the near future. Nintendo has stated they would rather have full titles on handheld systems like the 3DS than having online multiplayer for those. We also know that Nintendo is very interested in this concept being implemented on 3DS, having actually stated they were in talks with Vblank (our old friend) to talk about how the titles would work in conjunction with it.
“Let’s be very clear - Nintendo is absolutely not interested in charging a $60 purchase price for a game. This is an entirely new product category. Nintendo is going to make sure that any new title for the games was developed so deeply into the titles that the game could function in an instant with no effort. They are not interested in charging money for the title until they can determine that it’s an essential part of the game. The Wii U has built-in micro-transactions that allow the player to unlock content for the game on-the-fly.” - Reggie Fils-Aime (via @MrPhenom)
Of course, if Nintendo really takes that stance, then its stance on online play would change. While I wouldn’t be surprised to see this happen sometime in 2017, the petition has gained the support of a number of other game developers I know, who are very interested in the idea of supporting a game without having to deal with the hassle surrounding it. One can only hope that Nintendo can come around to the idea of online play, if only so that players can experience the full experience in one game at a time.