This post sounds like something a low-budget Indian newspaper would write but hey I guess some gotta dream here and there.
The dust has settled from all political angles. 1) Iran is weak and doesn't want hot border or hostile Pakistan which could create issues inside her own border directly. This one is off-limits.
The factions part is taken out of disney fairytale and Taliban has denied that again and again basically spread by Indian tabloids you know credibility and them don't go hand in hand. They were even writing tonight that Mullah Baradar has been killed
As for the ISKP. They will remain active but not as you envision them and not less active than they are in Indonesia the once in awhile pop up from months to months or years to years will occur once in a while but they will not just all of sudden emerge from the death and become a militant group they are very unpopular amongst the tribes and have no local support you can't just magically create supporters and tribal alliance out of thin. Hard sell for ISKP because people have already Shariah how do you make promotions for new fighters and motivation is very difficult for them and recruiting will hit a wall.
As for regional powers helping to build Afghanistan this will definitely happen and right now they are competing for the rights to extract the goods from the ground..