I think they are because Logan is going to reprise his role in the sea of monsters.
yes
Yes
The first one didn't come out yet, but they are probably going to make a second one.
they already did
I believe that they are going to make a second movie and it should be coming out sometime this year! 2012! I also found out that yes, Alexandra Daddario, Brandon T. Jackson, and Logan Lerman will be coming back and acting as Annabeth, Grover and Percy! Hope that helped!
Yes.
the mist
There is no second Percy Jackson movie. The first one sucked so badly that they didn't make enough money for a second.
yes
No they are not going to make a sixth book of the Percy Jackson series, as it is concluded. However, on October 12th, Rick Riordan's newest book will be released, titled The Lost Hero.
They are planning on making the second Percy Jackson movie. It is titled the 'Sea of Monsters'. It is estimated to be released into theaters around summertime of 2012.
Not really.