Straight from Famitsu.
http://nintendoeverything.com/84427/link-samus-costumes-in-dynasty-warriors-vs/
The latest issue of Famitsu has revealed an interesting collaboration between Nintendo and Tecmo Koei.
It seems as though the upcoming 3DS title, Dynasty Warriors Vs., will feature costumes from a couple of Nintendos franchises. From what I can gather, a Link costume from Zelda: Skyward Sword and a Zero Suit Samus costume from Metroid: Other M will be included. The Famitsu leaks havent made clear whether the costumes will be available on the cartridge itself for free or through DLC.
I imagine well be hearing something official from Nintendo/Tecmo Koei soon.
http://nintendoeverything.com/84427/link-samus-costumes-in-dynasty-warriors-vs/