Nintendo 3DS right thumb stick?

There's a rumour going around the web right now saying that the 3DS may have a new attachment soon. It would be a right thmbstick that attaches to the body of the 3DS. Now as I said this is still a rumour...but I hope it's true. I bought my 3DS on launch day and I can honestly say I've hardly touched it. There just aren't enough games that I want to play for the device. If Nintendo can figure out a way to make this work I think it would give developers a lot more to work with. They could possibly even port Playstation Vita games to it(they'd have to downgrade the graphics). It reminds me of Wii motion plus, an add on accessory that some games required. Now the motion plus comes standard in the controller. It would make sense for Nintendo to do the same with the 3DS. If its successful they would just add the right thumstick in the next redesign.