Marvel had the rights to such popular 1980s characters as ROM and the Micronauts via a deal with Hasbro. However, they lost those licenses years ago and other publishers got to print newer titles relating to the characters. IDW most recently published ROM but lost a lot of Hasbro rights in 2022, including ROM. Hence, not long ago Marvel announced they were releasing a big collection of ROM comics, "Rom: The Original Years Omnibus," which with that title makes you wonder if new years are coming too. Marvel got the rights back to ROM to some degree, clearly, and then it was revealed we're getting at least a couple Micronauts Omnibus books with, "Micronauts: The Original Marvel Years Omnibus Volume 1," collecting the first two years of that series. Those rights bounced around for a while too with IDW being the most recent party to lose them (IDW has had a rough go of things lately).
One almost wonders if other Hasbro properties that currently aren't going to be with any specific publisher could end up getting printed by Marvel (a return of G.I. Joe could even occur, I'd bet). These classic '80s comics getting reprinted is a snazzy occurrence for sure and I am curious about any new stuff possibly coming down the pike in the near future. I would not be surprised if fresh ROM or Micronauts comics get printed in 2024-ish, in other words.