I think the SCAR-H or ARX-200 could come, but as small batch orders for specific units, such as SSG. I don't think we wouldn't see two competing rifle platforms produced at POF. Besides cost, there is also the issue of competitive conflict-of-interest, why would FN Herstal, CZ, or Beretta part with export licenses when POF will also be producing and marketing the rifle of their competitor?
On the other hand, there is a chance we could see two rifle platforms manufactured in Pakistan, but only one would be done by POF. The other rifle would have to be made under license by a separate private sector company.
To produce the SCAR-H or ARX-200 under license, the local company will have to invest a lot in building-up a proper manufacturing site. This firm will also be competing with POF for domestic and overseas orders. But then again, if Zarvan is saying that the G-3 will be replaced by the SCAR-H or ARX-200, then in my view, this is the only way it can happen: POF will make the BREN and a private Pakistani gun manufacturer will make the SCAR-H/ARX-200.
It wouldn't be the strangest situation. If replacing the G-3s alone requires even 100,000 rifles, there's scale. The issue would be the presence of a capable manufacturing site at Pakistan (other than POF).