Straight from WayForward themselves, the update, which includes 5 new levels, will be coming this Thursday to everyone who owns or downloads the game. Here's the full list of updates:
5 all new bonus levels Enhanced stereoscopic effect to all previous levels By popular request, a “retry” button for dedicated speed runners
Though we already knew it was coming, the retry button will definitely be helpful for those that want to 100% the game. Curious to see what the enhanced 3D will look like as it was already a very clean and sharp 3D effect.
A new version of Mighty Switch Force will be available in the Nintendo eShop starting May 24th. Players who already own the title can download the game again for free.
Doesn't sound like the game is receiving a patch but instead just making us redownload a newer version. Although I guess this could be simpler for those that buy it after the update and aren't forced to download a separate update. Still, for larger games (this one is pretty big), it would be more convenient to just have a patch.
Just as in the case of Mario Kart 7, I think the process is more convoluted than it will be in the future, because 3DS games weren't meant to be patched, but in the future, they will be. The "hooks" will be in place, or whatever.
Some PSN games are bad when it comes to patches. You'll buy a game and download it, only to be required to download a patch that's the size of the entire game when playing for the first time. Braid made you do this, and it's annoying!
I just checked online and while the Mighty Switch Force download for the game itself is on the front page with the inclusion of the 5 bonus levels, there seems to be no way for current owners to actually update it. I guess they'd have to delete and then redownload it...?