Here is my idea for Marvel Ultimate Alliance 3
Instead of having one long storyline, there would be about 20 shorter ones.
Each story has a different location and the cinematics relate to the characters you have chosen.
Also you can choose to be team of villains and the story has you fight heroes.
Roster would be 60-70 characters, all playable, all have cinematics, all feature as bosses throughout the 20 storylines
My roster would be something like
Spider-Man, Green Goblin, Dr Octopus, Rhino, Lizard, Venom, Sandman, Captain America, Baron Zemo, Red Skull, Crossbones, Iron Man, War Machine, Iron Monger, Mandarin, Hulk, Red Hulk, Abomination, Thor, Odin, Loki, Enchantress, Thanos, Black Widow, Hawkeye, Fantastic Four, Silver Surfer, Dr Doom, Namor, Cyclops, Iceman, Beast, Archangel, Phoenix, Wolverine, Storm, Colossus, Nightcrawler, Rogue, Gambit, Havok, Cable, Psylocke, Magneto, Sabretooth, Mystique, Juggernaut, Deadpool, Vulcan, Deathbird, Gladiator, Emma Frost, Apocalypse, Mister Sinister, Daredevil, Elektra, Bullseye, Taskmaster, Moon Knight, Blade, Punisher, Ghost Rider, Dr Strange, Dormammu
Then there would be online deathmatch mode. Characters can be levelled up in story mode and taken online.
DLC can be new maps, new characters and new storylines