This game would again try to merge merlin's revenge with trees of war; however, you would control a team rts style.

So, in the background, you would have trees of war running(at a little bit more realistic pace than trees of war, but not too realistic, as you will need those trees) and weeding out various different tree types.

You would start out with a couple builders from whatever team you choose(like dwarves or goblin builders) and you would start harvesting some of the trees for wood(with different trees giving you different types of wood). With this wood, you could then put up some wooden buildings and start getting some more troops.

There are two other resources that you could collect: stones/ore and water, which would allow you to support and arm your troops(such as you need a certain amount of ore to make a swordsman, in order to produce the sword and shield) and build stronger/hardier buildings(say, putting up a stone wall instead of a thatched one, or great big stone towers)

Eventually, you could produce a force strong enough to keep defend against the elements, aka, big monsters and such, while you look to build another fort(collect different resources/get closer to the opposing teams)

In terms of the trees of war bit, using different wood types would determine the strength of the troops that you produce, and of course, various strains of trees are likely to die off. To prevent competition between different groups of trees(and keep some walking room for yourself) you can put up some walls(which can be attacked and destroyed) Trees would not be able to spawn on top of your buildings, walls or troops, so they could be kept apart from one another.

Alternative to needing stone and water, buildings could release troops randomly, like in merlin's revenge, but with stats depending on the materials that go into making the building.

For controls(allowing for touch screen usage, if that happens) you would draw a circle around a bunch of units to select them, and then drag a line to where you want them to go.
Your units would of course have some ai of their own, so if you tell a builder to go near some trees he'll automatically start chopping some down.

If this could be put in its own section, that would be pretty awesome, considering that bottom earth is a game of its own(not mr4)