Ignoring all the posts not remotely connected Jagex's announced updates in the future where this
FUTURE GAME UPDATE FORUM
should be used to discuss, let's look at some known Jagex reveals like the Elder God quest line that Jagex mentioned in several occasions.
I have already shown Elder God is classified as a large-size "unfinished business" in their Big 2018 Runescape Survey. Now, let's look at their actual description from Runefest 2017 Reveals:
http://services.runescape.com/m=news/runescape-2017-reveals
"Elder Gods
Talking of godlike powers, let's talk about the Elder Gods. They're beginning to stir, and when they wake up, they won't be happy. We've learned over the past few years that these guys have been sleeping under our noses, in the perfect world they created. We - the current inhabitants - are just noisy, dirty tenants. They want us gone.
Imagine what would happen if Bik - the elder god sleeping under Entrana - got up.
There's no battling this, no clever way of getting Vorago to stab it in the face, no weapon to make it turn and run. Can we reason with them? Can we revert the damage we have done, perhaps, or even find them a new home?
If their destiny works out, they are here to consume all living things, feed from the anima and make a new world more glorious than the last. Zaros is the key - the man with a plan - but will he survive the troubles posed by Sliske's Endgame? That is truly up to you."
Rest assured, Jagex are late with the Elder God quest line, but unlike other quests they also put in their surveys, they actually have a plot and description of this quest they are trying to produce. This one doesn't seem to be just all talk but no action.
The World Wakes certainly reshaped Gielinor... what about When Bik Wakes? Sound interesting and very promising. If this quest comes within the next 12 month, it alone will be better than all the quests we had the last year already.