Just saw this on Miiverse:
Hello, I’m Takaya Imamura, the Director of Steel Diver: Sub Wars. Thank you so much for playing.
We’re planning to release Version 3.0 in the future, and I’d like to take a moment to update you on what we’re working on.
In Version 3.0, you can set up Internet Battles with your Friends. This means as long as you have wireless internet access, you’ll be able to battle online with Friends you have registered on your Nintendo 3DS system, any time you want. However, keep in mind that this is limited to Friends who own the Premium Version of the game.
In addition, we’ll add two new stages exclusively for Local Wireless Battle to make this mode even more fun. You will be able to select these stages while playing Internet Battle with your Friends, too. We’re also working on adding subs that you can unlock by playing via local wireless a certain number of times.
The number of times you’ve played on local wireless in Version 2.0 will be carried over to Version 3.0, so if you have already met the required number of Local Wireless Battles, you may be able to unlock them right after you update. Once again, please be aware that these subs will be available only for owners of the Premium Version.
We're also planning to add eight new crew members, with various abilities such as launching mines while using the masker, and healing your allies. We've also made some other small tweaks. Your allies will no longer take any damage if you accidentally attack them in battle, and you can use the +Control Pad to enter messages in Morse code.
The in-game shop that was previously limited to Premium Version owners will now be accessible to players using the Free Version too. In addition, we'll be reducing the number of play coins required to play Internet Battle using the Free Version from two coins to one.
We're currently working hard on Version 3.0 and aiming to release it sometime in August. Thank you for your continued support of Steel Diver: Sub Wars!