Some of you fondly remember the days of classic beat em ups like Streets of Rage and Double Dragon. Whether you do or not, keep an eye on Double Dragon: Neon, a reboot of sorts of the latter series, and due out for Xbox LIVE Arcade and PSN soon like.
It's still 2D, but with updated graphics of course, and in addition to martial arts moves, features various weapons you can use on baddies and a boss charmingly named Skullmageddon. There's also a power-up progression system.
Double Dragon: Neon is developed by Wayforward (Shantae, Contra 4), and launches summertime.