Other Quick Idea:
Just show all the past series clips in slow motion with sad music playing - and have them all in Black and White, with echoes playing over really slowly and stuff.
And then just show the BB11 Chair with
'BIG BROTHER WILL GET BACK TO YOU' being played and then the screen cutting off.
Suddenly after a 5 Second Black Screen, Brian appears standing infront of the door at the top of the stairs.
'Has Big Brother ever lied to you? 
'
*Audience goes mad and titles blast*