Who: Wheatley and Mary Lightly
When: Late afternoon, day 75
Where: The lighthouse
What: Wheatley thinks he's clever and going to GlaDOS's lab. Neither of these are true.
Rating: PG-13 for possible mentions of violence/gore; Portal 2 spoilers are a possibility

( I made it all up. )

Who: Wheatley and GlaDOS
When: Early afternoon, day 72
Where: The front yard of 107 Dandelion Road
What: A core wakes up to find out that he's... not a core any more. And then, he's discovered.
Rating: PG-13 for possible violence? Also, Portal 2 spoilers :>

( The future starts with you. )