Serebii.net has pictures up now of Special 15. Someone's probably gonna have a guide up soon anyway, but from what I can tell from the pics, this looks interesting. Ash's Bayleef, Kingler, Phanpy, Totodile, and Cyndaquil all make cameos in the beginning. The new kid, Hajime, shows up to get his starter Pokemon just after Ash's startled herd of Tauros breaks through the Professor's lab. Tracey seemed annoyed at Hajime for some reason. I couldn't tell from the pics what Hajime was saying, but it seems that something was keeping him from setting off right away.
I like the little scene that happened right after that with Mimey and Tracey saving a Charmander that had fallen into the water. Soon after that it showed Prof. Oak taking Hajime to some cliffs for some reason, I got the impression that Oak took him there to overcome some kind of fear. It seems that he wanted Bulbasaur as his starter, so a young Bulbasaur was with them. They then encounter a Squirtle high above, clinging onto a branch. Hajime starts to fall and Bulbasaur saves him with Vine Whip, then Squirtle falls off the branch. Prof. Oak grabs it and Bulbasaur grabs the Professor too before he falls. Then it showed Hajime and Bulbasaur trying to get the obviously scared Squirtle to come out of its shell, which they finally do.
Then they get a phone call (not sure who the old woman was who took the call) which apparently warned them of some rampaging Primeape on the preserve, or something to that effect. Then we saw Oak, Delia, and Mimey watching the Primeape from behind some Bushes, joined by Hajime and Bulbasaur. Bulbasaur reveals itself a little prematurely, and the chase is on. Then comes the classic scene that's been done many times before in other shows, with Hajime and Bulbasaur, alone, on the edge of a canyon or something, with the Primeape closing in. They're saved by Ash's Bulbasaur, who uses its vines to lift them to the other side of the canyon, then uses a Solarbeam to scare off the Primeape.
Then it seems that Hajime is finally over whatever fear he had, and has bonded with Bulbasaur, so they get their supplies from Oak (the Pokedex and Pokeballs) and set off. Interestingly, at the end, it said "To Be Continued"... Seems that Hajime might be a recurring character...spin-off series, maybe?