DrIstvaan: I don't have any proof; I just find they've got their hands full with other things. So far, unfortunately, reality has proven me right, though: the only time they expanded the Activision catalog was the addition of the Zork games.

DrIstvaan: We can't know for sure when, if ever they get the game.
I wouldn't get my hopes up, though; it seems we're not seeing any more Activision titles anytime soon.
However, you may be sure we'd appreciate Pharaoh as well; counting you, we're at least 4 people who actively expect that game.