Well, seems the DMC5/Shin Megami Tensei Dx2 crossover is getting interesting.
Unlike the Bayonetta one, which had the Bayonetta characters cross into the Dx2 world via a parallel world kind of plot, the Devil May Cry crossover is a bit different.
Both you and the DMC characters gets dragged into a dimension bordering both the DMC and SMT Dx2 verses, and you discover it's a hunting grounds for harvesting powerful souls. You, Dante, and Nero have all been marked by the douche who dragged you into this world for death so your souls can be harvested. V shows up to warn you what the real deal is behind all this bullshit (after a brief fight), but Beelzebub shows up to muzzle V and tells him to shut the fuck up while telling you to just lie and down and die already so your souls can be harvested by "Mother", the stringpuller behind this soul harvesting business.
The rest of the story will unfold as they unlock it in a few days, more on that then.
Nero and Dante are both pretty kickass in different ways. Nero gets a nice buff after every turn that auto buffs his magical damage and can pierce lightning resistances, while Dante's Rapid Shot gives him an insanely high chance of critical hits, which grant bonus turns for your team. Dante also gets auto physical attack strength buffs after a turn in combat.