Iron Man #5

The solicit said this is the end of the 1st Act of The Books Of Korvac. This is the 1st reference to such a story arc name. And of course the story will continue into Act 2 next issue.

Isaac Christians became Gargoyle in Defenders #94 and stayed with them to the end in #152 where he and several other Defenders died. But he was brought back to life in a story running through Solo Avengers #16,18,20. He was Daimon Hellstrom's butler in the Hellstorm: Prince Of Lies series and later joined the Initiative. He's continued to pop up occasionally, last of all in Dr Strange (2018) #15-16 as part of the Herald Supreme story arc where he and many others died (again). But Strange restored the universe next issue so that's OK.

Eugene Patilio took over the Frog-Man suit of his villainous Leap Frog father to try to redeem his reputation in Marvel Team-Up #121. He's not appeared very frequently, but many of his apps have been with Spider-Man, including recently in the Hunted arc in Amazing SM (2018). And after that in Star #1.

The Spider-Man clone was created by Jackal in ASM#149, adopted the Ben Reilly identity in Spectacular SM #223 and the Scarlet Spider id in SM(1990)#52. For a while he took over the Spider-Man id when Peter Parker retired. But he was killed in SM#75. Miles Warren recloned him as the villainous new Jackal in ASM(2015)#22, but he re-became the heroic Scarlet Spider in the BR:SS series and got involved in the Spider-Geddon event. Lately he's popped up in Conan: Battle For The Serpent Crown #2.

Knightwing Restorations Ltd are Misty Knight and Colleen Wing and they were part of Iron Fist's cast from his earliest days in Marvel Premiere through his own series and partnership with Luke Cage. They were vpart of the 2nd Heroes For Hire team and Misty led the 3rd inarnation (which Gargoyle was briefly part of). Misty was also 1 of the Fearless Defenders. Most recently she's been 1 of the Daughters Of Liberty in the current Captain America series.

Misty should be well-disposed towards Tony Stark because he provided her with her bionic right arm (twice I believe). Her dislike of him may data back to the 1st Civil War when she didn't like the things he hired her team to do, nor the strain it put on her relationship with Iron Fist who was on the other side.

Will Halycon's adrenaline-suit mean that he got the team out of danger fast enough? I don't think they'd really kill Misty Knight off. But lots of people would be glad to see the back of the Spidey-clone.

Guardsman is mentioned here as working for Korvac but he's not been seen in this series. If it's not a mistake then he's presumably Michael O'Brien who dates back to #82 of the original run, and donned the Guardsman armour in #96. He later gave up the armour (which became the uniform of a whole troop of official Guardsmen soldiers) and became part of the Avengers support staff. Which was where he was last seen in the 1999 Av Annual.