Escape routes are published at the end of our flight plans if required (if minimum off route altitudes along the route exceed 10,000 ft MSL). Minimum fuel requirements are based on the worst case scenario of single engine or decompression. A takeoff weight reduction may be applied in lieu of the escape route requirement. I'm not sure if this covers what you are asking regarding between or before ETP scenarios, but yes, it would seem that worst case fuel would include circumnavigating the terrain via an escape route.