I have been thinking of doing this for some time. Don't know how this will fare, but well...
The idea is to take a bad film, use its concept, and turn it into a decent film. Of course, the definition of "bad film" differs for everyone, but that does not matter. It's mainly about being creative.
I'll start with Battleship.
The concept: Adaptation of the board game.
Basically, I would turn it into something like Das Boot meets The Hunger Games.
In the near future, following a war between two superpowers, the victorious side creates a game to show their "mercy" on the defeated.
The POWs (most not seamen) are split into two teams and placed within a huge enclosed "arena" at sea. Each team has the same number of battleships, submarines, destroyers, aircraft carriers and patrol ships. The winners will be freed.
To make things harder, the vessels do not have telecommunication abilities, or satellite images. So they are relatively blind and need to be careful to avoid friendly fire. Also, ammo, food and fuel are limited.
The story follows the crew of one battleship and we see things only from their point of view (like in Master and Commander). There is also the conflict of having to kill their own (after all they were on the same side during the war).