Map idears

im making a map called Futurecraft and i was planning on making it a dota stye map but i now think that its to unoriginal. all i know is that you will chose a hero (tank/plane/bomber/etc.) and you can use summoning spells to make things like heat seaking missiles (flying sappers with gyrocopter bomb model). any one got some idears on how i could improve it?:bgrun:

What about giving the target unit the possability to make a shield or hide it self so the missile would be useless?
And it could be fun if you made the units move with arrow keys.
And maybe add anti missile towers.
Another great thing could be wind, if you made a wind bomb or a place where there is wind maybe random wind placing then if the flying unit enters that place it would crash or have a chance to crash also add power ups that make the unit go faster or extra damage

would you like ammo? i recon i could do it useing wood as ammo and a trigger that removes different amounts of ammo depending on what kind of unit it is. that way i could make slow fireing unit use the same amount of ammo as the fast fireing ones.