I've read the story which the guy below mentioned. It is a fair and exciting continue.
But Honestly, I was a little bored of the same childish episodes of the Original Series as I began to grow up. Though Ben 10 was my all-time favourite show. The AF is a good continuation for it.
Still the show disappoints in the matter of Aliens.
There were only 10 (9 actually) boring aliens at the beginning. First of all Ben hardly transforms into any alien in an episode. Then the aliens weren't given any importance (except Alien-X).
Good when Way Big, Cannonbolt, and Upchuck entered the Track list. Most interesting part was where when Chromastone reformed into Diamondhead.
It was nice to have Aliens entering like Nanomech, Lodestar, and Rath.
IT'S A GREAT SHOW!!!!!!!!!!!!!!!!!!!!