9. Terrax The Tamer
With the amount of after-credits attention Thanos has been getting for the past few years, it would make sense to bring in someone with more of a stake in his evil-doing than a pair of adopted kids with serious daddy issues.
Terrax the Tamer would have been an inspired choice. Although in the comics he has previously been a Herald for Galactus it’s easy enough to gloss over this history, like the MCU has with a number of other characters, to make him one of Thanos’ main heavies.
Armed with an energy-absorbing axe and the ability to telepathically control stone, he would be more than enough of a challenge for the Guardians. Also, given that Star-Lord is likely to be somewhat busy with learning that Kurt Russell is his dad in Vol. 2, it would give some of the other members the chance to step up more – namely Dave Bautista’s Drax the Destroyer.
While Drax got to flex his considerable hand-to-hand abilities to some extent in the first movie, it was a bit disappointing to see him so embarrassingly beaten by Ronan the Accuser. Bringing in Terrax would have led to a more evenly matched conflict that would have made for some unbeatable action.