HAHAHA You think they make an adventure for IJ4? Why didnt anyone make a true LotR adventure yet then? They want to sell to the children, who are screaming to their parents "mommy I want dat game, so I can be Frodo and jump around like an idiot". They dont care at all to sit hours on one puzzle. They love to blow stuff up and jump around. I bet $200 that they will make another tombraider clone like Dantastic said. Or maybe even something simpler.
I have given up on waiting for BIS to come back to their senses and do a real ArmA 2 successor.