Most likely, there is going to be one. But if the producers decide to end it all in one episode, then we won't get one. Of course, you can't deny that many animes have been afflicted by similar questions to yours, but... You can always hope for the best. I personally think that there will be a second season. And, don't hesitate to start thinking about a third... Oh! Episode 13 is in 4 hours!
EDIT:Sorry about the massive confusion I caused... Episode 13 was a mistake. It was an error that occured on one of the anime sites. But I can assure you that the will still most likely be a second season.
-Draxor-
maybe
yes, i think, because siegfried was not dead at all and he will come on second season for taking his revenge :)
because bulma is dead
No. Courtney Cox is not dead. She is very much alive. Her show, Cougar Town is expected to return next season.
High School of the Dead
maybe
No. The Manga is still ongoing and a second season has been confirmed for next year ^___^
That's unlikely. I suggest you read the manga.
Dead Like Me was cancelled after the second season.
The Walking Dead has been confirmed to be renewed for a sixth season.
No. The Walking Dead has been renewed for a third season, which will begin in October 2012.
The Walking Dead season 2 is currently available on Netflix.
Season 3 of The Walking Dead will begin airing in October 2012.
Episode 13 has already been made in Japan but it is unknown when it will come out in America or if it will come out at all.
The Walking Dead seasons air from October to March.
There will be 13 episodes in the first season, and I've heard they have enough material to do a second one (assuming the first goes well)
sometime in the fall ;)