>>The really important thing here is to understand that Pilot Wave isn't a real wave/object. It is just a description of possible positions of the particle at specific times.
Is it possible that pilot waves are ripples in space-time? We should not make strong assertions especially when a theory is young. You make it sound like nothing more than the a regular QM wave function.
Ripples in space-time are gravitational waves. It could be a real wave but the danger is that one introduces a preferred references frame. Not that it would be the end of physics but it would surely be a big surprise.
