You won't see this in the new series.
And yeah, Romi Paku and Rie Kugimiya will be returning to their roles as Edward and Alphonse.
So, it looks like there'll be a FMA 2 series.
Wait, what? Fullmetal Alchemist is finished! Hell, they finished it twice! Second time, they really, really finished it! Edward and Alphonse are in our world, the gates are destroyed (presumably), WWII is on its way, the homonuculi are all gone, all is resolved. Sure, maybe not to everyone's tastes- I've read a lot of complaints at the direction that the series took in the last half or quarter and the movie being not quite as satisfying as the series. Personally, I like all of it. In fact, it's one of my favorite anime, and I even like it better than the manga on which its based, a rarity.