Now, while that would be cool... Lower your standards and expectations a little. This is Jagex we're talking about, remember. .
I reckon (if this does relate to clan citadels) these rubble piles will be where the "portal ritual" is done though obviously there'd be 1 special 1 at clan camp probably for it.
Would be kinda cool if for the portal ritual we got a cut scene of the five players doing it jumping onto the rock as it wiggles about then it shooting up.
Then load citadel area and we see various chunks of ruin flying up to form the island as we have restored its magic.
Yeah, pretty much expect to see a little cut scene where we use some magic to make the rocks float back into the sky (really just float off screen for us) then we use our magic to make a portal, and that's how we'll get to the citadels. Just a simple portal like we use to get to our houses.