Trump expressed his opinion about NATO and Russia, but he isn't a dictator, the neocon Republicans might not get as much "action" they'd like to see but in concert with other Republicans they should be able to keep the US foreign military involvement at at least Obama levels, the same goes for foreign policy towards Russia, China and the ME.
Somewhat softer stance on Russia is definitely possible, but Russia desires greater influence in the ME and no mainstream Democrat, let alone Republican, except Rand Paul, would let Trump make it easy for the Russians.