This story have lots of potential. Not only it is very funny but also happen when Izuku was at his most depressed. It is obvious that he will somehow lose memory of those events but I wonder if there will be some leftover in sub consciousness that will eventually allow him to recover to level of main story beginning. It would be rather ironic if Brainiac attack was necessary for Superman to exist in future.

I have a feeling that Kurisu have some connection to future Superman and thats why she is so reserved in contact with Izuku.

Ah, an interesting version of the Legends of Tomorrow. Also I'm guessing your Brainiac is a mix of DCAU and the comics version.

As always, excellent job. Great scenes with all the characters.

Keep the good writing.

Looks like no matter the universe, the Waverider's bound to have quite the colorful crew, huh? And Brainiac going back in time to kill teenage Superman. Ah, the memories of the DCAU are coming back full force, doesn't that feel great? XD

Pretty fricken cool, dude! Also, Jarro in gorilla in tiny Robin suit? Hilariously awful mental image, thank you. Looking forward to more!

It funny, of all of my guess on who the purple man was and guessing it was someone who serve Brainiac or had a symbol similar to Brainiac, I never once thought it was just Brainiac himself. But nonetheless I look forward to seeing how this story will progress.