What I would like to see that could possibly include ex hm's and this involves something that was supposed to be happening this season.
Have a public vote with all of the housemates up (without them knowing) then have an ex hm go in at 6am and wake the person with the most votes up with a megaphone telling them they have been evicted and have 30 seconds to say their goodbyes, when they leave there is no crowd (obviously at 6am in the morning) and the only other people outside are the ex housemates and Emma.
That would be a shocker of a twist IMO, it would shock the housemates and I would definitely tune in to see that on the highlights
Plus Marcus would actually for once have a valid reason to say 'The house was rocked to the core'