Thanos: Return Of The Mad Titan (Thanos Vol. 4 #1-4)

Thanos vs. the Illuminati with the fate of the planet at stake! As the Mad Titan descends to retrieve a cherished something he has lost, the Illuminati must band together once again to stop him - because they're the ones who hid it from him in the first place! And to prevent Thanos from destroying the planet as part of his quest, they'll need to bring in the biggest gun they've got: the Incredible Hulk! But what - or who - is Thanos looking for? And when he finds what he seeks, what fate awaits the Illuminati? With powerhouses Emma Frost and Blue Marvel joining Iron Man, Doctor Strange and Mister Fantastic - and Thanos raging mad following a painful rejection - get ready for the most consequential showdown in the history of the Marvel Universe!

Collecting THANOS (2023) #1-4.