My take away from the preview:
Spoiler for NT 12 preview:
1. It seems like the #6 might just be a title taken up by random people from time to time or it might be the #6 him/herself talking peoole into using it in such a way to mask themselves.
2. It seems like each Magic God has their own way of reaching Majin status, for example the High Priest starving himself to reach enlightenment or Nepthys being revered as a deity which in turn gave her Magic God status.
3. Touma does remember about jumping throught dimensions and Othinus trying to break him at least subconsciously.
4. They have legos in their universe?
5. Touma confirmed to be a single father and warden.
Apart from that it seems that their reason for goingt o the Dianoid is the same one I was thinking about while reading getting Othinus a dollhouse to live in, kind of expected considering it's the first thing that comes to mind when you read about a doll size character.