It's a hard no from me.
I saw the previous two in the theatre; not due to any genuine enthusiasm, but it was during I time when I had friends who worked there and could get me in for free, so I saw a lot of tripe--Including those. There hasn't been a good film in this series in nearly 30 years. In that time, including this one, there have been FOUR attempts at a proper sequel... that's absolutely pathetic and just shows the desperation and creative bankruptcy of Hollywood. Plus, James Cameron is a bit of an overrated hack. Don't particularly care for the majority of his work. His involvement doesn't suddenly magically justify this fourth retread.
Too little, WAY too late. Next.
*My signature from 2011 which I'm too lazy to change*
Currently awaiting the arrivals of:
Kid Icarus Uprising
Resident Evil: Revelations
Tekken 3D: Prime Edition
Metal Gear Solid: Snake Eater 3D
Beyond the Labyrinth
Heroes of Ruin
Luigi's Mansion 2