Maybe a game like this:
2d view (with 3d or 2d graphics), fighting game.
Setting is fantasy.
Characters are on a smaller scale to allow bigger characters
Characters are monsters/races (not specific characters like darkstalkers, but monsters/race, as some example some monster would be a vampire, and not Dracula) and some are fantasy classes.
Each character has a ratio cost, you can select as many characters you want as long it cost less points than the ones you are allowed to have, one example of a game like this capcom vs snk 1, the problem of snk vs capcom 1 is that the characters there, arent so different from each other to warrant different ratios (instead of balancing stuff), he ratio system is used to allow greater variety of characters, not as a lazy way to balance the game.
Characters are very different from each other, as some example characters will only have super bar if they have this thing (like mana or ki whatever), some would have ammunition and etc.... Those characters are balanced by their ratio points. The amount of points you have must be at least 4 times the least valued character cost.
The game is played between 2 sides.
The first side has 2 characters at the same time on the game, when playing on this side alone, you control one character and the AI control the other, but you can change to start to control the next one.
There is also an third tag character, that can be called to the game, to be swapped with the character you are controlling.
And then there are the reinforcements slots.
After some character from in game area, dies, the character on the tag slot will join the game, and some character on reinforcements slot will go to the tag slot.
Two players can play on the same side, if they do that, they share the characters they use.
More stuff/rules:
No time limit.
Just one round.
Characters wont share same super/ammunition slot....
Reasons behind this game idea:
-The ratio points allow us to have more varied characters, since they will just need to be balanced by ratio points.
-The 2 characters are the same time per team, allow faster matches, this because sometimes ratio points allow users to select alot of characters. This also allow 2 players per team (or 3 or 4 players playing at the same time)
-The tag slot (instead of not having it and having just the reinforcement slots), allows players (when 2 players are on the same team) to change their characters, by changing to the tag character.