Here's an idea for Pokemon fifth gen:
Use the '3D' engine to change the battle engine. In other words, have the Pokemon fully animated and tie that into new advancements in the gameplay.
Its time for Pokemon to have some significant change besides watching pokemon dance and energy bars drop. And beyond that, the game engine is quite broken, with about 20 Pokemon vastly overpowered over all the rest. And its not just because the Pokemons 'stats'. Its also based on the fundemental game engine, such as certain moves being overpowered or certain effects making some Pokemon types better against others. The constant small tweaks they've been doing since Ruby/Sapphire and Diamond/Pearl didn't help. They need to rehaul the whole game engine.
Six upcoming games you should look into:
