In a recent interview, Castlevania: Symphony of the Night producer, Koji Igarashi, talked about his newest project, the recently released GameBoy Advance game White Night Concerto.
While sales in Japan haven't been phenomenal, as the game's producer he was content with the comments and feedback he has received ever since the game's release. Asked about the possibility of a Castlevania game on GameCube, the not-so-surprising answer was "no comment."
Furthermore, Igarashi said he would like to make an online game. The actual development wouldn't be such a big issue to overcome, however the surrounding infrastructure would pose rather a big problem to solve.
White Night Concerto will be available in the US and Europe on September 20th.