Since looking at the "Beat 'Em Up" category here at the DegiGames community shows that it's an extremely under-represented genre (basically we have Phantom Breaker and its DLCs), and even outside Degica releases things aren't much better, I'll repeat a past suggestion, hoping you can do for the genre what you did with SHMUPs (for which you, almost single-handedly, turned the PC into a viable platform for the genre): please consider releasing some "old school" Beat 'Em Ups, preferably 2D titles.
I would love it if you could publish re-releases/ports of arcade titles (companies such as Data East, Technōs, Jaleco, Irem, and more have released so many titles in the genre that were never legally available outside of the arcades), or even something new.
A few random suggestions:
-Night Slashers (Data East)
-Shadow Force (Technōs)
-Undercover Cops (Irem)
-Gaia Crusaders (Noise Factory)
-64th Street: A Detective Story (Jaleco)
-Rushing Beat series (Jaleco)
-Denjin Makai series (Banpresto)
And a 3D title:
-Demolish Fist (Sammy)
My list above excludes titles from companies such as Capcom or Konami, who are very unlikely to license-out titles for release by other publishers.