So, the idea of a Death Battle fighting game is always popular, but I want to see who would be prioritized with a limited roster (While characters from repeating franchises are allowed, I think we'd go for the main rep from a series being prioritized. Let's go with a base roster of 32)
1. Mario
2. Sonic the Hedgehog
3. Mega Man X
4. Cloud Strife
5. Link
6. Ryū
7. Jin Kazama
8. Terry Bogard
9. Felecia (No Morrigan Aensland yet)
10. Raiden (Mortal Kombat)
11. Ragna the Bloodedge
12. Sol Badguy
13. Doomguy
14. Dante
15. Frank West
16. Leon S. Kennedy
17. Asura
18. Kratos
19. Samus Aran
20. Joker
21. Son Gokū
22. Ichigo Kurosaki
23. Naruto Uzumaki
24. Satoru Gojō (No Yuji, but Gojō is popular as hell)
25. Makima (No Denji, Makima is popular as hell though)
26. Giorno Giovanna (Jōtarō Kūjō seem like the more obvious pick, but I wanted to use the most recent protag that has appeared in the show)
27. Natsu Dragneel
28. Astro Boy
29. Ruby Rose
30. Spider-Man
31. Superman
32. Optimus Prime
Season 1 (Tracer, Luke Skywalker, Pikachu, Aang)
Season 2 (Kirby, Leonardo, Terminator, Sora)
Season 3 (Pit, Batman, Samurai Jack, Vegeta)
Season 4 (Kenshirō, Bowser, Shadow the Hedgehog, Lucy)
Season 5 (Chun-Li, Iron Man, Darth Vader, Mai Shiranui)
Season 6 (Bayonetta, Spawn, Misaka Mikoto, Alex Mercer)
(I'll let you decide future seasons)