I'll join the crowd saying go ahead and write it, we'll read it. I personally love universe travel and time travel so I'd read it anyway. The issue of having Harry face a short-term challenge helping mirror Dracos in 2 different universes at the same time is interesting, setting aside the whole romance issue. A strange thought is that it might be interesting for Harry to talk to um, George? (I can never remember which one died) or in the dream universe both twins or their girlfriends to figure out the issues involved in being attracted to 2 people who are superficially identical.