Why are they here? To make money, that's what businessmen do. It's what SD wanted, it's what Satori wanted, and unsurprisingly it's what Tiger and co. want.
However, you have to look at how they make money out of Oxford. We have no assets. They can't just sell off the ground for housing. As good as some of our prospects are, selling off Whyte, Brannaghan and others would only cover the operating losses until all installments are made.
So they way to make money is either to achieve promotions to maximise TV revenue, or to develop/build a stadium and get all associated revenue, or both.
Promotion to the championship is achievable with additional investment in players, but as Sunderland are looking to prove, this offers no guarantees. That is why the stadium option looks the most likely.
Why Oxford? Global, Oxford is as big a name as any outside of London, Liverpool and Manchester. It also gives a realistic opportunity for gain, not just as a club but as a global brand.
So, this is why "random Asian businessmen" want to get involved with out club, and they have the wealth and experience to succeed where others haven't. Of course, they might find that getting land and building a stadium in Oxford is much harder than they imagined. They might find a better prospect to invest in. They might just get bored and walk away. But the indications are that they have done their homework as far as possible sites, employed the very best people to do the initial feasibility studies etc. They have concluded other commitments and are now coming out to talk about their initial plans for the future.
People don't like change, especially when change has normally resulted in us experiencing more and more problems, but I'm struggling to see anything but positives with these guys getting involved.