That map is awesome. I really like the terrain, although I can't imagine a big enough map with it to be a Hunger Games Arena.
The arenas need to be big and using that style it would be really brick intensive. Not to mention it's all in zone bricks so you can't haver water.
I do think it's pretty though and I really like how varied the envirornments are.
However if you do go the Hunger Games route, you'll have some competition.
I already have a fully scripted Hunger Games arena, with hunger, hydration, randomized weapons spawning, random events, and a lot more.
I'm currently working on The Hunger Games 2 which is a much larger map on several islands. It isn't done but it is really neat.
Heres a picture of the old map:

It's about 840 64x64 plates large and 100% handbuilt.
The new map will be over 2000 64x64 plates, but to be fair about 500 of them will be water.
Some screenshots:



Although I wont be hosting it for about 2 months until the second one comes out, so if you think you can make a good one I completely urge you to go for it.