I don't see much benefit in making too many speculations about past lives.
Speculations? To see a vision? To go to a doctor and find out there is nothing wrong with you? It is good to find out why you thought there was. Sure; Aren't we all trying get out of the dark halls of speculation hence: meditation Through meditation we begin to see we are trapped on one picture frame with many frames preceding and following. To see the whole picture though... not just one frame. To see from beginning to end and all in the now.
Some of these things go from one life to another and we continue playing out old roles. Sometime we have to break out of these roles.It helps to be conscious of the role we continue playing out that is no longer helping us this time around. You too act out things unconsciously. We all do it. Where does this behavior originate? Certainly we could just work on the symtoms but it often helps to see the causes. Seeing the cause makes it easier to recognize the unconscious symtoms - so we can recognize why others may treat us certain ways they themselves may be unconscious of. We no longer need to play out these old roles that are no longer helping us. We also can work on strengths we have gained from the past if we are aware of them.
We are in the age of space annihilation but a higher age to come will be; the time annihilators.