I thought this would be a good idea considering that we get some insider info. now and again.
The insider information we have so far from VoG is -
That the secret garden never used in BB8 will be used for this BBX instead, and other secret rooms will also be used.
BBX will definitely take place at Elstree.
And BBX will definitely go ahead!
Now we have {Checkmate}'s information. This isn't really reliable at all, but still, heres what he said -
That the working title is BB 8.5
That its been cut down to 3 options: BB The Battle, BB Secrets and BB using Shipwrecked rules.
So if there are any other insiders out there, please post!