Metroid Other M

So Nintendo announced a new Metroid by series creator Yoshio Sakamoto by the name of Metrod: Other M.  At first blush this is a traditionally terrible Japanese use of English for the title, but do a little rearranging of the parts and you get M+Other = Mother.  As this is game supposedly expounds on Samus background is it a reference to her origins?  Or is it a reference to Mother Brain from the original titles?  Or I am I just poking around in the dark?  Who knows!