i think with the way 5th is going - simplified and more standard rules
with the loss of 4th ed bionics rolls i can't see it even being similar to its current rules.
the necron we'll be back, will probably be more like the conscripts "send in the next wave" with squads wandering back onto the board whenever the player removes the squad. something like that. all though i don't knwo how they could improve it with the presence of res orbs and spyders