This vaguely reminds me of Icomeanon6's fic 'Kanto the Disputed Frontier'. It was very well written with great science to boot.
On the matter of your fic on the other hand, I kind of like the idea of newly ressurected Pokemon though. This however, would be an AU of the Pokemon Universe which is in fact, an AU in its own right. Lulz just had to put it there.
In the case of scientists creating pokemon, why not you bring in the UN or something similar into this story. Maybe a few protests once the word is out. Conlict resolution with these new creatures. There are many possibilities for this type of fic.
However, like Valentine/Jax said,
1. This implies that Pokémon came about pretty much in the present day of the story. What about Pokémon that have been extinct for millions of years (like Kabuto, Anorith, et cetera)?
The problem with the above question lies in the fact that when you write in a certain franchise, the fans of that franchise expect that you're following canon. As in, Pokémon fans assume that the basic truths of Pokémon (like it's set in a world where there's always been Pokémon, one way or another) still exist. To take Pokémon, then, and set it in a completely different world without explanation would probably confuse the reader to all ends.
Yes it's true, unless you can come up with a suitable explanation, your fic might not make it that far.
Regardless, Good Luck!