Probably something along the lines of the Enfield Jungle Carbines or Spanish FR7/8 Mausers. Those were the last general issue bolt rifles used if memory serves.
We might see something in a straight pull along the lines of the Blaser R93 or Browning Acera with short barrels, synthetic stocks, 10 to 20 round detachable box mags, and flash hiders - think jungle carbine like but straight pull.
Features of the Steyr Scout such as in butt magazine storage, integral bipod, and forward optics mount option would also be good additions. The Savage 10 series rifles with their floating bolt head and large barrel nut are features that would make life easier for armorers from the perspective of ease of headspace & barrel change.