Pinsir and Heracross
With new games, there is always new Pokémon moves and maybe a few evolutions. With doing HGSS, they could give Pinsir and Heracross and evolution or pre-evolution each, maybe both each. As well as some nice bug-type moves for them to learn individually. Yes Pinsir is from Kanto Region, but also lurks in Johto as shown in one episode when Ash catches his Heracross.
I really hope for this, as I'd love to have one of these two in my team for Heart Gold, as I had Gold when I was a kid while my brother had Silver.
Anyone else have any hopes on evolutions, new moves, or expand your views on the hopes for Pinsir and Heracross.