14 DAY TRIAL // There's no official confirmation just yet and it's all based on a line from the Eidos site, but the gaming world is pretty much sure that Thief 4 has just been announced.
When Eidos Montreal was formed they announced that the first two projects they'd tackle would be "revivals" of "successful franchises" from intellectual property, which is owned by Eidos. We already know that there's a new Deus Ex, the third, in production at the Montreal Studio. And there are clear signs that Thief 4 is also in development.
Consider the clues. There's the afore-mentioned quote about revival of franchises somewhere here. Note the use of the term "successful" which rules out other Eidos-owned old IPs like Terra Nova: Strike Force Centaury (which was cool and all and way ahead of its time, but not successful) and the critical miss Terracide.
There is also an announcement saying they are hiring people: "Eidos-Montr?al is proud to announce the recruitment for our 2nd 'AAA' project" and then ending with the hint: "The title begins with the letter 'T'? " So T for Thief, because I really can't think of any other successful game that starts with T and to which Eidos has the rights.
We are all well aware that game companies are deceiving little entities that could spin it so that Terra Nova becomes a "great hit" which now gets redone, but we are really hoping that Eidos are above tactics like that. So, until further word from Eidos, we're working on the assumption that Thief 4 is in development and there's a chance we will again get to enjoy the stealth ambushes, the excitement of hearing a guard somewhere nearby and the joy of taking out a source of light that comes from playing Thief.
I'm sure that the readers know more about Eidos game, Eidos intellectual property and Looking Glass history, so if anyone has a better guess as to what other game Eidos Montreal could be hiring for, please drop us a comment.