LOL, its like the writers really wanted to end Ash's story with DP, but then the, "higher ups" didn't allow them to get rid of him, so they threw out their plans for an E4 arc and brought in Darkrai at the last minute.Hahaha, to think I was joking when I said Kotetsu would only bring five Pokemon to the match.. yet it's actually true! I've done this a couple of times lately..
Personally, I'd say its time for the writers to retire after Unova. They have clearly lost all interest in making the Pokemon anime an enjoyable experience, so why drag it on? Just give it up already, I'll happily search for and rewatch the pre-BW episodes when I get Pokemon cravings. Certainly not BW though..
And now BW is the result of the writers anger and frustration.