I still believe Anaconda is already explained in current Jungle X-Pedition lore by the maps that highlight all the snakes along the lakeside. I don't think the presence of animals requires a temple and, just logistically, I don't think making Anaconda a core pillar of the land is a good medium-term solution thematically.
I think there is PLENTY of room in Jungle X-Pedition for major attractions that aren't temples and I can imagine great, additional non-temple themes for Backlot and Flight of Fear in particular.
I also believe that there's some unifying thing behind all of these temples—something that is strongly suggested by Flat Rock and possibly alluded to in some of the darker, weirder, currently unexplained elements of the area's lore (the labyrinth, the dark void imagery, etc). These things could be explored in a temple-themed attraction, but I think they could also be justification for their own attraction all together—sorta the climax of the land's storyline—maybe the Volcano replacement?
I just definitely think that, based on what we've seen so far, we should make sure to steer away from the mental trap of "six temples = six rides = Jungle X-Pedition."