I didn't see the may, but it's still confirmation enough for me. I don't see why Bungie would tease us like that.
It [Moonlight Sonata (Lockout)] is described as having a series of interconnected platforms. It's chilly, isolated, and has a gentle glow. It's a relatively small map littered with fusion cores and ''will be loved by almost everyone'' and ''will be universally adored''. Now referring to the remaining 2 maps after ghost town Bungie says
Two of them in particular will cause a Three Mile Island scale pant-fill-disaster in the Halo community.
Seems like remakes to me.