The second episode of What If...? puts the spotlight squarely on T'Challa's transformation into Star-Lord, and we quickly learn that the Wakandan was way more successful in that role than Peter Quill.
The hero we know better as Black Panther has created a much better galaxy, but his biggest achievement was helping Thanos go straight. Yes, the Mad Titan is now a member of Yondu's Ravagers having abandoned his quest to wipe out half of all life in the universe after T'Challa came up with a better way to distribute resources from world to world (eliminating the need for genocide).
While Thanos clearly still believes his plan would have worked - that becomes something of a running joke - it's interesting that T'Challa was able to talk him down and help make this villain a good guy.
We'll have an in-depth breakdown of the episode for you a little later today, but this Thanos even manages to make peace with Nebula. What that means for Gamora is never explained, though it's possible that will be revealed down the line if What If...? chooses to return to this reality.
We're pretty sure they will, and we'll have more details on that for you soon...