I'd love to see her return in a future Kraven story line. For me I think a clever way to go about it would be to have Dr. Mariah Crawford (from the 1997 series) introduced and for Peter to immediately be suspicious of her thinking she was Calypso and spend a good amount of time trying to investigate her identity. Only to find no evidence that she was Calypso and then for Kraven to discover her and become obsessed with her and needing her for a ritual or serum. Essentially it could come out that Calypso is still alive but has multiple personalites and for the twist to be that neither one knows about the other much less who the original personality is. I think that'd be a good spin on her and a good way to flesh out the dynamic with Kraven