There are only 60 open spots left, if all the Pokemon revealed so far are indeed part of the new Unova Dex. 60 sounds like a lot, but really, picking the next 60 is tough! You just can't pick all the coolest ones, nor can you load up on Hoenn exclusively and hope to have any kind of balance type-wise.
Here are my guesses. Though I do like the idea of Electrike, sadly there are just so many pure Electric-types already confirmed that I don't think it's likely for him to show up... unless they ditch Pikachu! o_O;
Based on the pattern of what they've revealed so far, I've noticed they've chosen a good number of pure, mono-type Pokemon. So, since they've revealed no Bug-types yet, I went with both Pinsir & Volbeat & Illumise. Scyther & Scizor are in the BW2 TCG, and so is Heracross & Croagunk. The rest are just what I think would work really well.
The exceptions are probably Rotom & Ditto. I really think they'd add a lot to the region, but they're both very rare, so who knows how likely that is. Rotom has never been a wild Pokemon, either. But, both of them are involved in an in-game trade in BW. Rotom changes forms at the Unova Department Store on Route 9, too. Besides being a really cool, under-represented Pokemon, he also adds a ton of type diversity by himself, like Eevee does, only he only takes up one Pokedex slot.
