I’m too noob a mapper and don’t really have enough time to dedicate to map making. But when i was in my “phase” of wanting to make a map, i had this idea…
It was gonna based on the movie The Rock with Nicholas Cage and Sean Connery. I was wanting to give it an RTCW feel about it with duel objectives. Obviously it would have to be modern day themed. The map would be (as close as i could get) a recreation of Alcatraz. The axis would spawn on the very top right side of the fortress, and there would be the mobile missle launcher with the nerve gas in it (just like the movie). The allies would spawn at the bottom left, maybe on the beach as theu’re getting off dingys and inside the very 1st sewer room where they 1st emerge. Centre area would be 3 floors of jail cells with stair ways at either side to get to each floor, or ladders to climb up in the middle. Each level of cells can be opened. All cell doors open at the same time with the flip of the switch located at either side, one at the 1st cell, and one at the last. This could add some spice to the game, so if someone camping in the cells, or hiding from the fire, then the opposing side could close the cell doors and lock them in 
Objectives: Each team has an item the other needs to win the game. The allies have the code book with the firing codes for the missile, without it, they can’t launch the rocket. But this book also contains the codes for disarming the missile. The axis have the firing control mini computer (or laptop), they need to enter the firing code to launch the rocket. But the allies need the laptop to enter the codes and completely disable it. Now this isn’t a straightforward grab the objective and take it back and win. In order to win, your objective has to be at your base too. So if both allies and axis have each others objective and are at thier own base, they still wont win the map as their own objective has to be there for obvious reasons. The axis cant use the codes without the laptop, and the allies cant use the laptop without the codes. Whoever has both wins.
I had an idea for the win screen animations too to stick with the movie theme. If the allies win, then the entire axis spawn area and missile get bombarded by airstrikes. If the axis win, we see the missile firing off (or even head towards a football field)
Anyways my idea is way to big for a noob like me.