Still disliked mother brain died >Financially, Other M and Federation force happened.
Chronologically, I believe we will have some kind of plan to revive/ recreate the metroids as a species to counter the X-parasites. I doubt a crush will kill all of them, and Other M does prove Metroids being able to resist cold after modification(It's most likely an intentional flaw by the Chozos).
Also I means levels, not leveling system to be removed.