This is a new thread for a new serie, so we should most likely be a little careful with avoiding spoilering to much of it.
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That aside, it is a really interesting observation with regards to Stain and the transfer of One For All.
Though i think the ingestion of DNA bit is only a minor part of passing the torch. I think its a concious act to give the power over to someone else, as it is an actual passing of the power One for All, we have heard off how All Might is slowly losing it himself now.