it is not possible just by the way the game is at this moment in time. We can not create maps in which there are triggers like in WC3, which is made by blizzard, which has the best map making system ive seen. when/if sins ever has a map system which allows a player to have specific scenarios this might become possible (perhaps in an expansion or if a later version of the galaxy forge) when it comes down to it, there is just a lack of people who want a scenario like game, people seem to just want to brainlessly mass different combinations of units at each other and watch the units do all the work while not doing much else (sorry, it just annoys me a little how people are so lazy while playing this game and how allot of possibilities were left out due to it)