Metroid: Federation Force is coming out soon, and Nintendo is prepping for its release with a new trailer showcasing a bit of the co-op gameplay. You can see partners helping one another out in real-time and get an even better look at the graphics. We don't get much of an idea of much though since it's such a short trailer, but it does shed some light on the gameplay and it does look fairly promising. The game releases on August 19, and will come with Metroid Prime Blast Ball as well, which also has a free demo on the 3DS eShop.

https://www.anrdoezrs.net/links/3607085/type/dlg/sid/UUhgUeUpU35379/https://www.youtube.com/watch?v=pTKApLBPR8k