As the time of this writing, no details about Jessica Jones Season 2’s plot have been officially disclosed, and there weren’t that many clues left towards the show’s future at the end of Season 1.
Maybe IGH was also connected to the experiments that Kilgrave’s parents were running on him and other children.
These folks are too important not to follow up on.
It’s still unclear whether they were the ones who caused the crash or if they even somehow gave her those special abilities, but there’s definitely a connection, and now that Trish has those files she received from her mother, she and Jessica should be able to dig up some information.