@Amir Ayyaz
I only want people to shed some light on both sides of the picture i.e. In favour and against zone-2 and zone-5 for the benefit of the general public so that they can make an informed decision about where to put their lifetime savings.
As for me, you are right, i am indeed of the belief that zone-2 is better - because main roads from zone-1 will definitely cross gt road and go through zone-2 sectors and societies for two reasons:
(i) Firstly, because zone 2 is contiguous with zone i and there is no other zone in between zone 1 and zone 2;
(ii) Secondly, the new Islamabad international airport is also touching zone-2.
Work on Margalla Avenue is already started and the present govt is trying its best to complete it before elections. As for d-12 and e-12, these are in zone 1 and Margalla Avenue will pass very close to these 2 sectors. D-12 has now started and it is only a matter of time when you will see sizable population in d-12 especially after Margalla Avenue.
As for zone-5, I agree with you that there will be posh localities and commercial areas in this zone because of DHA and BT, but this zone does not touch zone-1 (which is still considered the so-called real Islamabad). In between zone 1 and zone-5 there is Rawalpindi. But between zone 1 and zone 2, there is only GT Road. If there are roads that go through fly overs above gt road, then zone 2 will merge into zone 1. Sectors like g-15; f-15; g-16; f-15 will become very close to zone-1 sectors like g-13 and g-14. Because of new airport, this is only a matter of time.
But only Allah knows about the future, we can only guess.