There is a big appetite for these games and I could see this one working as only Bliz could make it if they ever u know put down the cookbooks.
Super Sanctuary Racers:
Playable Heroes would be pulled from all Diablo Games -
These choices would affect their car speed, power, stability, acceleration, size, grant 1 usable ability and 1 passive ability, and
Defeating a player gives you an option to steal their weapon and defense boosts.
Speed - Top speed.
Power - How much you bump other players
Stability - How much you resist bump other players
Acceleration - How fast you gain speed.
Size - Size of your hitbox to either affect other players or be hit by other players.
Some examples:
Bard:
Passive Ability - The bard can choose 2 passives but no usable ability.
Usable Ability - none
Amazon:
Passive Ability -
Usable Ability - Throw a piercing spear in a straight line. This recharges on lap completion if you are in 1 2 3 or 4th place.
Mage:
Passive Ability - The Best Defense is a Good Offense = The mage has no defense boost but room for 2 weapon boosts.
Usable Ability - Magic Missile which is a low damage but 100% always hits the target and cant be blocked. Magic Missile regenerates when you pick up a weapon or steal weapon.
Necro:
Passive Ability - Army of the Dead = Slowly spawn zombies and skeletons on the track that attack other cars.
Usable Ability - Bone Meal = Run into your minions to heal your car for a limited time.
Barb:
Passive Ability - Rage = Deals more damage the less health he has.
Usable Ability - Whirlwind - Deal a large amount of damage around you but lose steering power. Best used on straightaways. Chance to leave dust devils.
Druid:
Passive Ability - Shapechange. Has a wolf and bear car he can turn into for different strategies for a limited time. The wolf is super fast and the bear has 5 star power.
Usable Ability - Changes based on form.
Paladin:
Passive Ability - Chance to block any damaging attack that hits him. Chance is higher at more health. The paladin uses weapon boosts at 20% less effectiveness and defense boosts at 20% bonus effectiveness.
Usable Ability - Divine Shield = 4 seconds of invulnerability on a long cooldown. Chance to recharge if you are in first place on lap completion.
Game would have not only power boosts in red ?s but defense boosts in blue ?s.
A car can have 1 defense and 1 power boost at once and these have random rarites. Mythic rarity boosts regenerate their uses overtime.
Treasure gobs that spawn on the track grant more rare boosts.
An active track helltide will remove all defense boosts from track and spawn fire enemies like fire demons.
Tracks would be different dungeons.
Winning races and such gives you materials to upgrade your car parts. Unlock unique and legendary parts to further customize and gain some power.
Each season lasts 1 month and has leaderboards and cosmetic rewards on season end.
I ran out of idea on this here…