It looks like the Saudis are buying their way into Trump's good books, with big arms orders. Where this leaves the situation with some rich Saudis financing IS I don't know.
But the big thing is, as has been mentioned on here before, when does the war on Iran start? The Saudis hate Iran and vice versa. The Saudis are backing the rebellion in Syria to get Syria out of the way as it is an ally of Iran. If Putin hadn't stuck his oar in Assad would probably be history by now; which is why I think Putin is getting all the bad press recently.
The middle east never gets any better. There is always trouble there; we should keep out noses out but we don't.