If it happens it would make for a great SBO event - the Warren card in London, Chisora/Wlad in Germany and then Khan/Maidana in Las Vegas. That'd be some night of boxing.
There's more chance of a Ricky Hatton diet video than that happening. The likelihood of Khan/GB and Warren sorting a deal between them for a Box Office show is very slim, add the Klits to the mix and it becomes nil.
I agree about Khan, but i'd imagine Warren would get the UK TV rights if Wlad fought Chisora so even though the fight would be in Germany he would have no issue showing the Wlad-Chisora fight as part of his box office show.