Nothing's confirmed about ANYONE, So if anyone says such and such is going in don't take it to heart.
The last I heard Rex was a stand in and there has been drop outs so it's likely but then again the producers tend to ignore BB9 and like to arse like BB8 for some reason.
So there's a chance he won't because there may not be any BB9 housemates for some idiotic reason and if there IS it may be someone like Mikey
We can hope though.
When asked on Twitter, Rex said 'Wait and see
'
So he's teasing us.