Wave 1 had four of the seven regular classic Headmaster characters - Hardhead, Chromedome, Brainstorm, Mindwipe.

As hoped, or expected, the other seven regular classic Headmaster characters (as Titans Return toys) are wave 2 - Highbrow, Weirdwolf, Skullcruncher.
Similar to the first wave, these have some minor colour differences to their first release by Hasbro.

NOTE - Weirdwolf and Skullcruncher have their original 1980s names (the Titans Returns release had modified names... maybe they couldn't secure the names in time).

Official images have been mirrored here... and the links to their Walmart listings, for those who have access to it or have friends over there to help you get them.

Surprisingly, they are US$20 each, which is pretty good, as that's the current retail price of the Deluxe class over there, and these have big fancy (retro) packaging.

Ships June 1st 2021... so yet another pre-order listing of something that is a loooong way off, which can lead to a lot of pre-orders piling up to keep track of, or suddenly pay for if too many suddenly get released at once.