I'm sure this will excite a few of you, as it has been confirmed that Jay Pinkerton who co-wrote the Portal 2 story is now back at Valve.
He wasn't gone long, since he only left Valve last year when multiple others also left. Obviously it's rather interesting him joining again, especially since Valve is once again making games. He's now up again on the People at Valve page, under the "Other Experts" title.
The only confirmed new Valve games right now are Artifact and In the Valley of Gods (both of which are coming to Linux of course), so it will be interesting to see if we get a third Portal game or perhaps something else entirely. The official Valve Software website does state:
We have some new games in the works, too. A couple have been announced, while others remain top secret.
We've yet to get any hints as to what these other top secret games are.
Pinkerton also worked on the Team Fortress 2 comics, so it's possible he's back to do some more.
Credit to PCGamer.