There's already a founder's tower map :3
It's the Security Tower, though. Which appears to be the tall main tower on the Ark.
A Casino map would be pretty sweet. The missions would be pretty cool too. Like there are hostages or valuable weapons that will give an edge to who wins the ark.
Weapons? In a Casino?
But escorting multiple people could be quite a challenge.
My vote would go to Navy Vessels, I think.
Especially a large
aircraft carrier which the Resistance try to convert into a escape vehicle. Instead of planes on the top, they've began building homes (imagine a small city which is partly still under construction).
Their first objective was to transport some important items from the Ark to the carrier, the Security try to take the items back to the Ark.
If the Resistance success, they will have to implement the technology they've (basicly) stolen into the ship architecture (three stages with one construction each), the Security tries to stop them from doing it, becasue otherwise the technology would be really hard to reclaim.
The final stage was for the Resistance to get all refugees on the ship by stopping the Security from destroying the bridges which connect the carrier with the Ark. When all people are on the ship, it ventures to new lands and a sequel.