This is going to be an idea for season 5.
This story begins with all the Brawlers out in neaphia and gundalia and these 6 have too defend earth as Naga is revived.
Ravis: The First to discover Vestroia and partner with the god of Bakugan, Bahamet
Bahamet: The Bakugan God, he is the pinnacle of who stands on top of all existince and beyond and is known to have saved the multiverse 700 quintillion years ago
Nyx Rhoadfield : A small town delinquent determined to be the best at battle brawling along with his bakugan Brynhildurr
Brynhildurr: A Pyrus/Ventus element hybrid bakugan her power is rivaled with Potara Dragonoid
Silver E Diamond: a young brawler skilled and has strategy. A Pyrus brawler
Apollonir: Silver's Bakugan and one of the six legendary soldeirs of vestroia.
Seige Apollonir: Apollonir's evolution. Can Fuse with Sentinal and Galaxy Drago to Become Delta Sentinel for Sentinel Drago and Delta Galaxy for Galaxy Seige
Deus Apollonir: Applonir's second evolution Can Fuse with Vortex Drago to become Deus Vortex
Draconis: another young brawler but thinks power is every thing. A Darkus brawler
Leonidas: Draconis(s) Bakugan.
Omega/Alpha Leonidas another 2 in one bakugan like preyes. Omega is Pyrus and Darkus and Alpha is Haos and Aquas. Leonidas's evolution
Runo Misaki one of the original 6 brawlers quit do to tigrerra not evolving but is back with an evolved Tigerra. A Haos brawler
Glaive Tigerra: Tigerra's evolution
Julie Makimoto: anotheir of the original 6 Gorem also evolved. A subterra brawler
Tremor Gorem: Gorem's evolution
Klaus von Hertzon: At one point the number 2 Brawler and his sirenoid has evolved. An Aquos brawler
Grand Sirenoid: Sirenoid's evolution
Komba O'Charlie: At one point the number 5 brawler and his harpus has evolved. A Ventus brawler
Joe Brown: Wavern's partner
Twilight Wavern: Joe's Bakugan and the Evolved form of Wavern
Dan Kuso: Number 1 brawler. A Pyrus Brawler
Sentinel Dragonoid: Drago's newest evolution Can fuse with Seige Appolonir to create Sentinel Seige
Galaxy Dragonoid: Drago's Second evolution of the series Can fuse with Seige Appolonir to create Seige Galaxy.
Neutron Dragonoid: Drago's third evolution of the series Can fuse with Deus Appolonir to Create Deus Dwarf Star
Potara Dragonoid: Drago's fourth evolution of the series
Dragonoid Andromeda: Drago's fifth and final evolution of the series
Shun Kazami: number 2 brawler. A ventus brawler
Gale Skyress. Shun's Bakugan and the evolution of storm skyress. A BakuFusion who can fuse with Geo Preyes to form Geosurge
Marucho Marukura: Number 4 Brawler who is really smart. An Aquos brawler
Geo Preyes: Marucho's Bakugan and the evolution of Preyes. A BakuFusion who can fuse with Gale Skyress to form Geosurge.
Spectra Phantom: Number 3 Brawler. Uses Darkus Bakugan
Sigma Helios: Helios first evolution of the series
Helios Black: Helios second evolution of the series
Helios MK3: Helios third and final form of the series
Entropy Naga: the evolved form of Naga.
Regis: Unknown Origin
Marduk: Unknown Origin
Masqurade: Alice opposite personality
Xeno Hydranoid: Hydranoid's new evolution
Billy and Fault Cycloid
Chan Lee and Hectare Fortress
Julio and Horo Tentaclear
Mira Clay and Phalanx Wilda along with Roxtor
Ace and Umbra Percival
Baron and Solar Nemus
Gus and Promethea Vulcan
Fabia and Terrigen Aranaut
Linus and Ophicia Rubanoid
Ren and Taka linehalt
Nurzack and Sabator
Jesse and Merged Pithion
Lena and Final Phosphos
Zenet and Counter Contestier
Mason and Mercury Avior