Okay, i just wanted to address this before I talk about other things. First, making a section of a Disney park isn't just about fans, it's about atmosphere. Can they make you feel like you're there? Otherwise, it simply looses the magic and it doesn't have the same effect. That's always been what Disney World has banked on compared to other theme parks. It's selling point has always been immersion. You step in the gates and it really does feel like you are in a different world. So, while Pandora and the Avatar movies don't have near as many fans as some properties they could have chosen, it was easily adaptable to an immersive world, especially in the Animal Kingdom. (I've been to it, it was awesome let me tell you.)
Anyway, on to the rest in order.
Movies: More than likely.
TV Shows: Maybe, but I'm still somewhat of the mind Bionicle doesn't translate to TV well.
Theme Park Land: Probably not, simply because i think it'd be too difficult to make it immersive, yet stay well grounded. Could it be done? Sure. Could it be done to Disney's standard? Maybe, but not without more time and money than Disney would be willing to give to a comparatively niche franchise. Though, if it were to be built, I have a feeling it would probably be put in either TomorrowLand at Magic Kingdom, or some of the empty pavilions (maybe imagination? It could use some sprucing up) at Epcot (excuse me as I bemoan it's decline in recent years). However, if it's movies are big enough blockbusters, they might consider putting it in Hollywood studios instead.