SCAR is dead, SOCOM didn't want it, doubt army will. It has such a few change it doesn't really make much difference, ACR beats it in every level
ACR - Too expensive, good luck selling 2.8k stuff to the army, they'll won't buy (civilian price are usually few hundred more expensive, but considering it being close to 3k in the states...
XCR, M4 is a familiar platform, why change when there isn't that much improvement
KAC SR-16, might be the next if they keep prices low (like how FN took M16A4 over Colt)
LWRC, might be depending on how much they can produce and how much they could design