The Halflings pack a big punch in a tiny package. They're headed to the battlefields in Kings of War. You can start marshaling your forces by putting your name down on the list to get this new army as soon as possible. Mantic has started taking pre-orders of several different Halfling army bundles over in their webshop.
From the announcement:
This is it folks! The hugely anticipated halfling army is now available to pre-order from the Mantic website. This is our THIRD army release this year, following the Ratkin and Salamanders. Seriously, we are not messing about for Kings of War.
Late August and early September sees the first wave of halfling releases, which are all available to pre-order now. The second lot of releases will be alongside the Clash of Kings 2022 supplement in November.