At its PAX West 2018 panel, Capcom revealed that Devil May Cry 5 will come with a photo mode, a gallery mode, and a training mode.
The full panel, which Gematsu was kind enough to share on YouTube, is embedded below. It showcases the Goliath boss battle, Gallery mode, and Devil Breakers including the Overture, Gerbera, Punch Line, Tomboy, Ragtime, Helter Skelter, and Rawhide.

Time Stamps:

16:53 – 20:03 ? Goliath boss battle
21:16 – 21:50 ? Gallery Mode
24:40 – 36:24 ? Devil Breakers

Devil May Cry 5‘s new character, Nico, is the mastermind behind Nero’s Devil Breakers. Capcom has provided official descriptions of some of the aforementioned Devil Breakers, which you can find below:
Overture The first Devil Breaker built by Nico. An orthodox weapon compared to the other arms, damaging enemies with electric bursts. Its name is derived from this straightforward functionality. The first Devil Breaker available in the game, this arm is easy for starting players to use.
Gerbera
A Devil Breaker that launches shockwaves from its petal-shaped complex reverberatory furnace. The recoil can be used for instantaneous movement, and converging the shockwaves makes it fire a high-output energy beam. Beautiful design belies tremendous firepower.
Punch Line
Rare demonic minerals give this Devil Breaker jet propulsion power, packing incredible destructive force behind each blow. The arm can detach to fly around autonomously, during which Nero can ride it. ...