Silver Surfer #60

This issue doesn't have the Infinity Gauntlet brand but does begin within IG#6, and I believe that's what the Finale part of the title refers to.

Midnight was introduced and killed off in Special Marvel Edition #16 as a boyhood companion of Shang-Chi forced now to fight him. He appeared in Avengers #131-132 and Giant-Size #3 as part of Kang's Legion Of The Unliving.
The Kree recreated him as Midnight Sun in an enhanced cloned body but without memories. They sent him to fight Silver Surfer in #29-30 but SS deactivated(?) him. The Kree revived him again in a backup tale in Annual #4, but he escaped from them and found himself on the Moon where we encounter him here.
I don't think there was any previous hint of a scarred face?

He'll find Shang-Chi again in a tale in the SC: Master Of Kung Fu (2009) 1-shot. But he next appears as a villain in Deadly Hands Of Kung Fu (2014) #3-4, Domino (2018) #4-5 and (as I write this) Iron Fist: Heart Of The Dragon #2.

The Inhumans home Attilan moved to the Blue Area Of The Moon in Fantastic Four #240.
Black Bolt, Gorgon and Karnak had a cameo in Infinity Gauntlet #2. Before that they were with Lockjaw in Avengers #334. This was the beginning of the Collection Obsession storyline, and Lockjaw was with his mistress Crystal when she joined the team in later episodes in #336-338.
Lockjaw will continue to be more popular than the others. He'll be with Crystal's estranged husband Quicksilver in X-Factor #71-72 as he joins *that* team. Then it's back to Crystal again in Av#343 (it's easy for a teleporting dog to alternate between parents) before rejoining the other 3 Inhumans for Guardians Of The Galaxy (the team from the 31st Century) #27 where the GOTG seek Inhuman help for their sick Inhuman teammate Talon.

The Collection Obsession (Av#334-339) was the last place we saw Collector before his cameos in the last 2 issues. His spacecraft actually crashed in the Blue Area Of The Moon in #334 and beings called the Brethren escaped and attacked Earth. Collector pretended to help the Avengers but it turned out he'd deliberately released them as a weapon against Earth. In #339 they turned on him and appeared to kill him in his crashed ship. Then in our #58 we saw him crawling from the wreckage.
Now of course he will be in our next storyline sending our hero after a dangerous alien but, again of course, his motives will turn out to be not what he claims.

Thor (Eric Masterson) will be there when Impossible Man annoys the Asgardians in a tale in IM Summer Vacation #2. Then he tackles power couple Absorbing Man and Titania in his #436 before helping the Avengers face the 1st of the Gatherers in the above-mentioned Av#343 (and #344).

Warlock continues with the end of IG#6 where he, Gamora and Pip The Troll find Thanos living as a simple farmer.
Then godhood goes to his head, and Gamora and Pip recruit Dr Strange in his #36 to bring him to his senses.
This leads to the Warlock & The Infinity Watch series.