7-Go is "Number 7", he is an agent-type horse like Agent S, Kid Cat, Big Top, and Rocket. They have numbers 1,2,3,4 on their helmets and shirts. 7-Go is "Number 7", Meaning he will be an addition to the agent-superhero types. Why is he number 7 and not 5 or 6? Well, he is received from visiting a 7-11 hotspot in Japan!!!! He requests the you make his house look like a convenient store, allowing you to use the 7-11 items in your game.
Felyne will bring Monster Hunter items to the game, as Felyne is the cat-companion that helps you out in the Monster Hunter series. I believe that all of these villagers will be free, as 7-Go will be promoting 7-Eleven and Felyne will promote the monster hunter series.
7-Gou is named Filly in the English version and she is a normal villager, and Felyne is a Lazy villager. Also the 7-11 logo was removed from the furniture and Filly's shirt in the European ver. for some reason? Also there was data for Gamecube villagers that didn't make it into New Leaf (besides Louie and Carrie) found in the game, Including villagers from the Japan-exclusive Doubutsu no Mori e+!