If the timeline ever gets to the sixties, I think it would be cool to see the European withdrawal from the middle-east. Make it an optional thing, that can have severe consequences depending on your choice (see the middle-east today). For me this is actually an idea I would like to see in HoI IV, instead of being limited to release a pre-defined country with it's borders already drawn out, maybe we could make our own? I mean, we are the supreme ruler of whatever country we choose, right? We should be able to define our own borders and do what we want with our country.
(Adding to this)
For example, say I play as the UK, I want to release Northern India as a sovereign country (or puppet), but I want to keep some of the land, and maybe keep a neutral border between me and South/Southeast Asia. In HoI III, this is impossible. You can only release India as a whole. Think of this idea as a client state in EUIV. You select the provinces that you want to give to your client, you choose their flag, color, and maybe even install a hand-picked leader? This may not be too historically accurate, but HoI IV seems to be taking away that restriction that previous HoI games had, and giving you the ultimate choice in how you want to run your country.