Yeah, Launch Of Regional War, good one. It's been so peaceful in the region up to now. Russia invades Syria, bombs indiscriminately, promises to bring in 150,000 troops -- none of their business, either.
Unless the Saudis hire a bunch of western mercs to fight that regional war, it’ll just be another arab on arab clusterfrack. The only force that can make an arab army look competent is another arab army.
It would be entertaining to watch on youtube, though.