Highly unlikely that the contest will return.
According to Dean Wesley Smith (see quote under this paragraph from a SNW dicsussion
I had with him and several authors a few years ago) they did loose money with these books every time, and I doubt that Pocket would even consider to re-establish a moneyloser in the curren economic climate.
“Anthologies never make enough money in publishing.” Dean explains. “Nature of the beast, but Pocket Books and Paramount wanted to fund this to get the new writers in, to keep the fans writing Trek, and it worked for ten wonderful years. But even deep pockets like Pocket Books and Paramount couldn’t continue to lose as much money as this was costing them, so ten years seemed to be like a good place to stop. I didn’t expect it to go past year one, to be honest.”
I'm not into fan-fiction, but have you checked this board's fan-fiction forum