Since that particular tweet, Production Weekly's twitter has not clarified if they really meant the Halo TV series that Steven Spielberg was doing. Which wouldn't make sense really, because Spielberg is producing that, and so Scott and Spielberg can't both produce the same Halo thing, and so.. Hm.
Ridley Scott's last couple of big movies include Prometheus, Robin Hood, and of course Aliens and such, etc. Prometheus 2 still seems to be in the works, so math considered, this Halo movie would then come out after Prometheus 2, somewhere past 2015. Or you know, whatever. And then an upcoming Blade Runner thing.
Those tweets also mention that a Paul Scheurig is writing the Halo movie, who apparently wrote FOX's Prison Break show, and some Adrien Brody/Forest Whitaker vehicle. :/
Considering that Halo 5 is still absolutely still coming out somewhere near the end of 2014, a nice epilogue or DLC pack thing would be nice to keep the Halo'ness going into 2015, alongside this movie and such. Or like, Spartan Ops?.
And you know, all things considered, I would much rather a movie that was made by Scott, all bad-ass and Prometheusy, than whatever Peter Jackson/Neil Blompkamp were doing. Hobbit, District 9, Elysium?. Mm, Prometheus is really fucking "bad-ass", comparatively.