How I think Ash's journey should end. Ash goes against team Rocket. Big time. He's returned to Pallet Town, and this time the whole of Team Rocket, Giovanni included, decide to take Pallet Town. One side will fall after this, and we'll see some closure to at least a few story arcs. This will have every main character in it as well. Some Amourshipping.
Avoiding all theories of Pokemon World being our world, what if the concept existed on the earth as it is now? all animals, birds and fish that exist today were Pokemon that could be caught and had individual types? What if there was a big regional league twice a year? This adventure follows four trainers from the Mercia region (ie -Central Briton), to become Pokemon Masters.
Pikachu becomes a human, and is distraught. This is not how it was supposed to be! Him an Ash were supposed to be best buddies for life. Where does that put them now? Will he ever be able to change back? This story focuses on more the bond of friendship Ash and Pikachu have, rather than the potential romance (sorry to Pikashippers).