Oh yeah, I'd only put the likelihood of OKC winning the next two games at 10-15%. Unfortunately it seems like Indy winning both is about the same. I don't think they can win the series without these next two.
If they don't get next two, you're banking on game 6 forcing game 7 as the only real chance.
It would be pressure situation where one team is clearly more loaded and playing at home, the other has just slightly more experience via coaching and one player but on road.
Of course barring injuries which can always tilt anything.