Will Kurdish fighters become a problem once ISIS is defeated? It will cause headache to Iran and to Turkey in the first place and to Iraq itself if the Kurds start claiming independence. What do you guys think? The Kurds are getting a lot of arms as of late and might shift to fighting the Iraqi army afterward. Maybe that is why Iran has decided to intervene in fighting ISIS so to make sure the Kurds don't achieve anything once the situation settle down.
Instead of saying Kurds maybe we should analyze it by dissecting it to factions like KRG, YPG, PKK, PJAK.
- KRG:
KRG's ties with Turkey is excellent we provided them with weaponry and aids during their fight with the ISIS. Iran did the same. But Peshmerga had some problems with Shite militia in Kirkuk as Peshmerga moved into Kirkuk and decleared it as Kurdish territory (taking it from Iraqi Central Government) so we may expect some kind of stand-off between KRG and Central government. Iran would stand behind it's shite brothers. But i don't think, things would escalate into a war. As KRG would be decimated by combined Iraqi and Iranian forces, they would seek peaceful ways to solve the solution.
-YPG:
YPG is currently being used be US to act as it's ground forces in Syria, they are expending their territory in Syria. Unless they expand their territory all the way to Mediterranean (which they can't because Turkmen towns and villages stand in their way) they won't pose a threat to Turkey. Although we affiliate them with PKK. They have never attacked Turkey and probably never will as the terrain is not suitable for insurgency fighting (flat plains). Iran doesn't have any borders with YPG, so no problem.
-PKK:
PKK operates in the KRG controlled land. Barzani doesn't likes them much as PKK promotes Öcalan but Barzani likes to be the man and never share power with other factions. He deploys his family members to various positions in his government. So, we can say, Barzani would confine PKK.
About PKK-Turkey, Recently Ocalan called for "drop of the arms" for PKK. Peace prosess is going in full speed. PKK doesn't involve with Iran much
-PJAK:
These guys are history...some of them are fighting in Iraq against Daesh and say" We will return to Iran and liberate there"... but they are bunch of clowns. Nothing serious would happen. PJAK doesn't involve with Turkey much.