So a little bigger than RNRC... that is good... so it might be at least as long, or slightly longer than that ride. Though honestly it would be hard to say because everything is based on speed and also the size of the indoor queue....which I am sure will be larger than RnRC... Since the majority of that queue seems to be outside... I am sure they would have configured a larger indoor portion for this attraction.... It honestly does not look that massive when you see the people in the photos....
Unfortunately, the model makes the ride seem like a fairly short track length. Yes, speed will affect it, but I suspect it will be a "zippier" ride, given the effect they want to create. I worry it's ride length will be closer to Tron than Guardians, much less Everest of Big Thunder ride time.