He never stated that SSJ God was more powerful than any of them. He only provided rankings between SSJ God, Beerus, and Whis. If you look at the number rankings I provided, SSJ4 Goku and Vegeta, even in DBNA, don't even rank a 1 in comparison to BoG era SSJ God. Had Goku gone SSJ God in DBNA, he'd be far more powerful than Gogeta
I think that Goku's reiki will be restored by making six saiyans donate their energy to him making him a super saiyan god. Of course, it won't last long enough for combat but probably only to restore his reiki. Also, I have two theories on how Gohan's latent power will be drawn out; Firstly it is possible that because Aladjinn will try and assault Gohan's emotions he might be able to unlock the power, or, since Piccolo will become a Sage Namek he will have the same power as Elder Guru to unlock a persons potential and he will unlock Gohan's. These are just my predictions fell free to agree or disagree.
Oh, you see I was sure that super saiyan god wasn't appearing in the series until I read the power levels page which gives the supe saiyan god multiplier. That is actually how the idea popped into my head. But, since he can't I really wonder how he will get his reiki back. You really know how to build anticipation .
And does that mean that your number for the fusion dance is 100x one of the two fusionned guys, or is that a number only for Gogeta (Goku and Vegeta both having a PL of 2k billion and Gogeta having a PL of 200k billion) ,