Just a little tidbit I heard recently...
Hollywood (whos anchor attraction is T2) is the lowest-performing area in the park merch-wise. The beancounters think this speaks to the longevity of the attraction. The only saving grace in the Terminator exit store is the Star Wars/Marvel/other sci-fi merchandise. Terminator sells squat. In fact, there are (at this time) no orders for new Terminator merchandise...all they have is what's currently in the warehouse and that's not a whole lot--this is apparently atypical of the Christmas season. And if Harry Potter taught Universal anything, it's that the key to a successful attraction is all in its associated merchandise. As if that weren't enough, the show has been breaking down rather frequently, which is a huge pain considering that the motorcycle used in the show does not exist anymore making spare parts impossible to find, and that it's using outdated A/V equipment.
I love T2, it's my favorite show in any theme park. I am hoping that these things are just anecdotal and don't hint toward an oncoming demise of the show...I'm not a Universal employee but it seems that from within the park they think that T2 is going pretty soon based on all of this.