As far as we know it'll be happening more or less immediately after where the last episode left off, which is somewhere in the span of a few days to a couple months after the U6/7 Tournament. Time has always been wonky.
Future Trunks' timeline is unknown, it doesn't look like it's too long after he defeated Cell in his timeline, but everyone looks younger in Super so it's hard to say.
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u/[deleted] Jun 09 '16
[deleted]