One of the biggest complaints about Pokemon games are that they're all the same. Of course, we know that's no more true than saying all Street Fighter games are the same, or that all Call of Duty games are the same. Just like with those two series, the surface details may be similar amongst the various Pokemon games, but the mechanics, the graphics, and most importantly, the weapons and characters (or in other words, the Pokemon) are different depending on which game you're playing.
That said, it is frustrating to occasionally bump into Gen-1 Pokemon like Geodude, Rattata, and Oddish in your shiny new Pokemon game. When you buy any new game, it's usually to see the new stuff that it has to offer. It's nice to see old favorites eventually, but not the second that you boot up a new purchase.
Seems like the developers of the next Pokemon agree with that. According to a blog entry by the game's developer, you wont bump into any Pokemon from previous games until you've cleared Pokemon Black/White. This has people who have played the game saying that "It's like playing something completely new, similar to when I played Red & Green". You don't hear that about a Pokemon game very often.
Personally, I still haven't picked up Pokemon Heart Gold/Soul Silver. I know they're great games, but I'm just not up for catching the same Gen-2 Pokemon that I've already caught 2 or 3 times already. Looks like Pokemon Black/White will be more up my alley then those recently released remakes.
What about you? You bummed that you wont be catching a Pikachu right away in Pokemon Black/White?
Black and White only has new Pokemon until the end- [Andriasang, via Gonintendo]