I always assumed that this was a re-purposing of the NIS implant, possibly with additional (but less invasive) neural augmentation allowing fine control of the fighter craft that are their tools of trade. The NIS is certainly less restrictive than the standard capsuleer implant set (which seems to represent very early Jovian ship integration technology - the cloning tech merge seems to be emergent and immortality is certainly a byproduct of design and engineering, not original technology according to what lore there is).
However, the NIS isn't awfully job-specific - it keeps your 'identity' intact after the destruction of the current physical 'host' while neatly sidestepping the issue of 'multi-cloning' by dint of its superior firmware. In the same way Amarrian dropsuits demand the implantation of a 'hydra-graft' membrane, I thought that any 'augs of the job' could be implanted into a Valk pilot - so long as they didn't directly connect to the poorly understood NIS implant itself (locking out the kind of whole system 'living ship' style of control a capsuleer can have due to their more understood brain configuration).
Looks like marketing got dibs on the lore, hopefully the lore team will get a crack at it as it moves beyond pre-alpha. Though they did their job with the casting - certainly a crowd pleaser and a personal anchor point for how I envisage the cocky, unafraid of death fighter jock of space types.