Filipino statehood just isn't viable. At one point, perhaps it was, but there is no way that the United States today annexes a sovereign nation thousands of miles away (even at its behest) to make it a state. The most likely foreign nation to enter the Union would be Cuba, and even then that remains extremely unlikely. No doubt the United States and the Philippines will continue to have close economic and military ties, but statehood in 2015 (as per the OP) I highly doubt. A good POD for potential Filipino statehood in the 20th century might be having FDR survive to serve his fourth term and never grant the Philippines independence. The U.S. retains them as a dependent territory (a la Puerto Rico) and eventually grants them statehood once the population reaches a sufficient size and enough assimilation and urbanization have occurred.