When about I interviewed the developers about the player feedback system Darknet, a bunch of you asked what this meant for the future of Hydrophobia and whether the studio had abandoned plans for sequels.
Because I love you, I asked.
"Darknet doesn't affect the plan for the series at all, and the iterations are simply our way of responding positivly to the great feedback we had from players," said senior creative designer Rob Hewson. "Our engine allows us to make micro updates to existing games which could be informed by Darknet data so the games can be enhanced and improved. The only way this affects future projects is positively, because Darknet provides a wealth of extra information to pour into future developments too."
Sure, that doesn't exactly lay out what the future of Hydrophobia is in any specific detail, but Hewson continues to refer to Hydrophobia as a "series." Given the response to the game seems to have gotten better with each iteration, taking another stab at a proper follow-up seems likely.