It would be interesting no?
Especially with though infected by it [Would they be Zombies then? ]

Yeah but the Progenitor Virus, especially in 5, was a excuse by Capcom to not use anything really T-Virus related.
"Oh we just used the Progenitor Virus on this, this and this."

That is possible, but perhaps they wanted to give the Ganados from RE4 a heavier role. Plus, the Progenitor virus explained a lot of Spencer's and Umbrella's back story, as to why and how Umbrella was founded and what got Spencer into DNA-altering viruses in the first place.

Maybe, due to the fact that it was such a major piece of information, not to mention a pretty big plot device considering it was grown right there in Kijuju, the Progenitor Virus was used on Las Plagas instead of the T-virus. Or it could've just been a matter of convenience. When you have a powerful cell reconstructing virus and the facility to manufacture it right under your nose, you don't ship a giant load of biohazardous viruses from across the world to mess with Las Plagas, especially since there's no guarantee the T-virus would even react properly with Las Plagas.

I think that's the point though, it'd be BEYOND intriguing and interesting to see how Las Plagas would react to a T-Virus modification/injection/etc.
Oh Capcom, think of the possibilities!

But, you see, the most likely result of mixing the T-virus with something as versatile as Las Plagas would be either a very intelligent and powerful race of parasites or a catastrophic collection of monsters, both of which would likely result in a doomsday scenario or something along the lines of "Everyone at the facility was killed and the creatures are roaming wild in the area." type of thing.

Except the zombies in RE1 were being used to formulate combat data before it was leaked into the city by 2 and 3. So it was really all orchestrated.

The zombies were an accident. The outbreak was an accident, except to Marcus who decided to pwn everyone. Can't blame him myself. So only the non-zombie B.O.W.s were used to obtain combat information, and even that only occurred after the accidental outbreak. Actually, the zombies shouldn't even be considered B.O.W.s.[/quote]

Zombies, whatever the occurance, carry the virus and can spread it to others. And seeing as how they destroyed the City in the first place kind of gives them the right to be considered B.O.W.s.

I don't know about the monkeys...as for the sharks...

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