Actually, he granted an interview to The Hollywood Reporter, or more specifically its hosted blog Heat Vision, in one of apparently many press encounters Tim had during last week's D.I.C.E. Summit in Las Vegas. Still though, be a sport and check out what he has to say about Psychonauts 2:
You are an established voice in this industry –
Oh, established voice. I like that.
Does that make it harder for you to live up to expectations when you’re releasing a new game like Psychonauts 2?
I don’t think about that too much. I think the reason we made the first game was that we were just making what we enjoyed. I think we’re doing that again. You definitely think more about your obligations to the characters than to the audience. We definitely keep in mind the player’s experience from the first game, but it’s what’s true to these characters and what situations do we want to put them in and how will they react. That’s more of what I think about.
When do you decide to come back to a series?
For a long time, we never did it. Psychonauts 2 is really my first time going back to a narrative but it doesn’t really feel like going back to it because you get into this frame of mind when I made the first game and we had all these hooks and plotlines that we put in the first game for the next game. We always thought we’d do a second one but it kind of got shelved for a few years. It was surprisingly easy to inhabit those heads again just because you know them really well.
The full interview isn't a whole lot longer, but read it anyway.
Source: The Hollywood Reporter