Since the Galaxy Tab 3 is out, I wouldn't expect to see any update for the Tab 2 until after the Tab 3 gets it. Since the Tab 3 was released with 4.1.2, I am not going to hold my breath. Also, based on support from most manufacturers for most devices, the fact that there is a Tab 3 reduces the chance that an upgrade for the Tab 2 will be released at all.
If you ask Samsung, I believe their answer will be some variation of the following (the same as any other Android manufacturer on any version question).
"There is no announced date for an update to Android x.y for that device at this time."
If it is in the works, we will probably find out by the presence of a leak a few weeks before the official release, with an official announcement of a release date a week or less before the release... probably on the first day of a roll-out deployment.