I think it'll end with an ultimate tournament. This requires each BF brain and champions to regions and also elite 4, he finds out, and he scrambles to win a league(which he does) Ash beats all of the top trainers, and he has to trek to the top of mt Silver and face another... who is his father (who he eventually beats.)
And then there is another part of the movie focusing on the main co-ordinators, which ends because of all of the major regional villains unititing, plummeting the world into chaos. Ash beats them all with his friends, who travel in Gary's and Scott's cars to evade attack.
The world is now safe, and after the co-ordinator championship, Ash has a child (9 years later). This child wants to become a co-ordinator, which she does, Ash gives her an Evee, and she goes of and starts her adventure, and Max becomes the brock of the group.
And a new series begins...