This is wonderful speculation, but the problem is the evidence points in the other direction. Afrasiabi likes his universe breaking multiverse crap.
For the record as convoluted as it is, yours is a far better explanation story wise Molvonos. Again, most people didn't utterly despise WoD's time travel until Afrasiabi dropped his 6.2 turd. It's the main reason people want WoD struck from the canon.
I am greatly concerned Afrasiabi might continue down the path of this multiverse crap. This presents more paradoxes the longer you look into it. By current logic there are multiple Velens which means multiple Arguses as well, are they all Legion worlds? Christ. Kosak should have been put in charge in Metzen's departure, not Afrasiabi.
*quoted posts were edited down slightly to reduce this post being a wall of text, if anyone finds something wrong with either post please refer to the originals*