Poketransfer (Haha just kidding!)
Your question says could, and quite frankly, the Pokemon company can do whatever the heck they want, so yes there COULD be one.
There were events for Mew in the past (the most recent one was for Heart Gold and Soul Silver), and they definitely want to make it possible to legally obtain the Pokedex, so they will most likely hold events for Pokemon hard to obtain in the newer games (such as Black and White). But they might probably encourage players to use/find a way to use the Poketransfer and transfer a Mew from an older game.
As for starters, I'm not sure if that is a very likely event, but if its going to be an event, it would probably be a Dream World one. (They already had some Dream World starter Pokemon events in Japan.)
- 02.21.2012 1:33p