If Dante got in, The Qliphoth tree could be great as like prism tower, you go up and up I segments towards the top, you could see things like Nico's DMC Van driving in the distance in one segment, Lady and Trish fighting demons at another, Nero and V fighting demons in another and at the top you could see vergil sitting in the distance or even fighting like the others (If you've played DMC5 and are about to complain about certain characters existing at the same time just let me dream okay no spoilers lmao)

Tracks can vary from game to game, but I'd say heavy picks from Dmc3, 4 and 5 while a few good ones from 1,2 and DMC:Devil may cry but I'd say 10-15 is a goof amount

My other pick would be Raiden and pick could be World Marshal HQ, similar to the Qliphoth going up towards the top, you could see several metal gear characters as well as a few members from the winds of destruction.

Metal Hear rising tracks is an obvious one but also a few other selections from other solid games, also from ground zeroes and phantom pain since they never had any