The way I see it, Ike will be replacing Roy. I dunno, his gameplay sounds like it'll be completely different from either of those two, and since we don't want redundant characters, we'd stick with the more popular character - that being Marth, of course.
Either way, Fire Emblem stage update. You've seen it in the trailers, both inside and outside, but have you seen it... UNDERGROUND?
...
...well, no, neither have I. And the brown blur they use to illustrate "underground" isn't very specific, as he leaves you to find it out on your own. Whoopee.