As written, the reputation system in Marvel Multiverse is very stagnant.

During character creation each hero chooses their traits and tags. Then very few of these specific options, which almost no players will take, give a character a very small reputational note about a specific group. Beyond character creation, the core rules give no details on how a team of heroes may build a reputation for themselves, whether it is good or bad.

The archetypical example of a character with a dynamic reputation is Spider-Man (Peter Parker). Using the Ultimate Comics version as an example, in just the first 21 issues in the public eye he goes from unknown vigilante, to defender of his school, to suspected murderer, to eco-terrorist, and finally becomes a hero. This is made more complex because each villain he’s faced has become an enemy and his relationship with fellow students has changed around.

So how can we emulate this in our games?

The easiest method of creating a reputation system is to steal a common system from video games I call a repuation table. These tables are used to represent each faction in a game is represented, list prominent members listed, and then at the bottom the players repuation with each faction is. Lets make a quick version of this same table for Ultimate Spider-Man.

Faction	General Public	Kingpin’s Gang	Hammer Industries
Prominent Members	Aunt May, Captain Stacy	Kingpin, Electro	Justin Hammer
Reputaion	—	—	—

We now have the factions and their main members figured out, but we need a method of determining the actual reputation level they each have towards Spider-Man and what that means. The following table has 5 levels of reputation and what each means to the hero.

Reputation	Score	Result
Admired	81-100	The hero is considered the pinnacle of what a true superheo is by this faction and will generally go out of their way to help the hero.
Liked	56-80	The hero has gained the factions favour and are generally friendly.
Ignored	46-55	The hero is either not really on the factions radar or have a neutral standing.
Disliked	21-45	The hero has become an annoyance to this faction making them generally unfriendly.
Hunted	0-20	The hero is hated by this faction and are willing to harm the hero even if it costs them.

Finally we create a simple way of gaining or lowering reputation. Start at the relevant point for each faction based on their tags, or at Ignored for any other.
Next, whenever the hero interacts with a faction decide if that interaction was a positive or negative one. Positive interactions increase reputation while negative interactions lower it.
Finally determine if it is a Major, Moderate, or Minor interaction. Major interactions alter a factions opinion by 10 points, moderate by 5, and minor by 1. A narrator might even deem extraordinary situations, such as sacrificing yourself to save a city, to be an extreme interaction which alters the opinion by 20 points.

Example Major: Hawkeye (Kate Bishop) kidnapped Madame Masque and assumed her identity while attending an underground auction. Since Madame Masque is the head of the Magia at this time, this is a major negative interaction. Hawkeye’s reputation with the Magia lowers by 10.
Example Moderate: The Magia were conducting a weapons deal on the docks but were stopped by Hawkeye (Kate Bishop) showed up. Since she busted a money making operation for the Magia this is a moderate negative interaction. Hawkeye’s reputation with the Magia lowers by 5.
Example Minor: A group of Magia thugs break into Hawkeye’s (Kate Bishop) apartment. After she beats them up and this is considered a minor negative interation with the Magia. Hawkeye’s reputation with the Magia lowers by 1.

With this done we can now finish the reputation table for Spider-Man

Faction	General Public	Kingpin’s Gang	Hammer Industries
Prominent Members	Aunt May, Captain Stacy	Kingpin, Electro	Justin Hammer
Reputaion	82	5 (Hunted)	34 (Disliked)

We can then continue to extend this table out as needed. I suggest keeping the number of factions to 6 or fewer since that way players can more easily keep track of which factions there are.