Not totally sure in what form it will be coming back - it sounds like it's going to be via Live Arcade and PSN but might be something much more than just a retro remake, but I guess it depends on how you read between the lines.

The story starts over at Spong (a games blog) where they talk about some info they uncovered while visiting Team 17.  You can read the full article over a the Spong site

So what do you know so far:

• Big budget (for a Live/PSN game)
• Should be out with in a year

Speculation:

• possibly a 're-imagining' rather than a straight remake
• based on the Unreal engine
• it's going to be awesome ;)