No shot Vi doesn't make the launch roster. She's already one of Riots most popular characters and is the lead of one of biggest TV shows right now. Also, no rep from Freljord. I'd probably swap Mord for Trynd, Jayce for Vi. And then I feel like Samira is a lock because of how similar she is to one of the most popular characters in MVC 3, so maybe drop Lee Sin for her. Other than that, solid roster.
Yeah, Vi and Samira are definitely champions that could make the cut. However, when I considered the archetypes, swapping them for Lee and Jayce seemed like a good idea. These characters are not often talked about for the game, and from my point of view, they fit the game pretty well.