Movie News: It is being reported that Spider-Man: Homecoming will have not one but three villains. Michael keaton's The Vulture. Logan Marshall-Green rumored to be playing the Tinkerer who builds The Vulture's flight suit from alien material leftover from the battle of New York with the Avengers. And, they have added Bokeem Woodbine as a corporate businessman, but have yet to reveal who he might be playing. Other potential characters being mentioned is The Shocker.
Luke Cage/Powerman is cited as having strength level at Class 50. Can lift 25 tons, while Cap's limit is 800 to 1200 lbs. Plus, his body if virtually invulnerable even taking a fall from a ninety story building and walking away. Cap can fall 2000 feet and walk away. Luke Cage according to the comics was not involved in a super soldier program like Cap, but experimented on when he was in prison.
Punisher, if I remember right, he was more along the lines of simply an normal human who held Olympic level athletics/endurance with superior fighting skills.
Since they are introducing Mephisto, and Patsy Walker was for a time working for him it is possible that he would gift her with powers. Given that the Terrigen crystals had yet to be released, how did Jessica Jones gain her powers before that event? Technically her powers, Iron Fist's, Luke Cage, etc would be considered Inhuman? The MCU can't use any mutants because that is trademark to Fox. It is highly probable that at some point Mephisto would kidnap Patsy/Trish Walker, and when she returns she will be Hellcat. It is unlikely they would introduce certain characters without a chance of eventually showing their alternate identity like Skye/Daisy becoming Quake. Helena Bertinelli on Arrow becoming the Huntress. Roy Harper becoming Arsenal. Barry Allen becoming the Flash. Jessie Quick becoming a speedster. Cisco becoming Vibe. Ronnie Raymond and Dr. Martin Stein becoming Firestorm.
There have been duplicates of Cap and Black Widow. U.S. Agent was an attempt to recreate the super solider serum to make another Captain America. There was a blonde haired Black Widow. But, the comic version of the characters and movie versions are different. Cap is pretty much the same, but other the Natasha in the movies was born in 1984 unlike the comic version who was born in 1928. Movie version was not given the serum which extended the comic version's life. There are still some similarities between the two but yet different at the same time.