Yes, you read that title correctly! We're happy to confirm that a Bank update is very real and is coming! And yes, it will include the long-awaited and requested feature, Bank Placeholders!
Please note: It goes without saying everything you read below is a work in progress and could be subject to change at any time.
Bank Placeholders
The Bank Rework was first announced way back at RuneFest 2016. Sadly, we probably got a bit ahead of ourselves and in the months that followed hit an assortment of technical hurdles that prevented us from ever launching it. We acknowledge that this has very likely gone some way to dampening your excitement and anticipation, and we're sorry. But we're quietly hopeful that the changes we've got planned will make up for the somewhat protracted wait!
Bank Placeholders is undoubtedly the most requested Bank update. Most people have a very strictly arranged bank or, at the very least, have tabs for certain gear. But when a player wants to take out their expensive PvM equipment, the bank collapses itself and moves everything around. This can be frustrating to anyone who has their items in specific places, or want to know where something is at any given time.
So how is this solved? The idea is simple: whenever the last item of a stack is withdrawn, the item itself stays in place at the same spot at 0 quantity, therefore putting a stop to unwanted shuffling. Any deposits of the item at a later date will replace the placeholder. This feature can be turned on or off.

Bank Improvements
With this update we've also taken the opportunity to give the bank some 'under the hood' improvements. We'll go into detail on this a bit further in a future developer blog.
In the meantime, let's take a look at the new Bank interface!

1. A new tab scroll arrow
2. Bank button additions
Plus, there's a new default number to move window. Similar to the Old School RuneScape's 'quantity' bank option, you can withdraw/deposit the listed quantities with a left click. However, if you need a custom value, you can set that via the 'x' option.
3. Integrating the backpack/worn/beast of burden/preset buttons into one area, in addition to adding your Coin Pouch amount into this window
4. A filter option
Note: This makes future filters easier to add as well (though at this point we're not sure what future filters could even be added - let us know!)
5. Dynamic searching
At a glance - Live vs WIP
So, how does all of this look once you put it in place?

Road to release
So, the big question - when is this all going live?
Fundamentally, we want to make sure we do this right, so we're going to be running a beta. This will be a great chance for you all to have a go for yourselves, and to let us know if we've forgotten anything. We're aiming for this to happen in July/August/September of 2019, so we won't have an idea about release dates until after that. In the meantime, keep your eyes open for a blog digging deeper into the code behind this project courtesy of Mod Hunter.
If you're keen to hear more, Mod Shauny and Mod Hunter will be showcasing everything in a livestream tomorrow during the data stream - 15:00 game time on twitch.tv/RuneScape!