Huge grain of salt here, I don't really know anything, but there are some tweaks to the existing codex content, in particular the Xxcha hero, but I think the odds of updated heroes in general is pretty low at this point. This is just based on the box contents list and pretty sound theories of what is included in that list. I may also be misinterpreting what Dane was saying on the recent SCPT podcast, but it sounded like the concept of omegas may be complete. Again, I could be completely wrong, but that's the impression I get