Battle AirForce, a vertical-scrolling bullet-hell STG set three years after Battle Marine, is scheduled for release in April 2024.
https://store.steampowered.com/app/3476490/Battle_AirForce/
This title is an orthodox vertical scrolling barrage STG, but you may find evolution from Battle Marine in many places.
We are planning a 40% off release sale for the first week after release, so if you are interested, please register your wish list.