There already a topic with this information pinned to the Halo 4 forums with most of this information.
Here
http://www.343industries.org/forum/topic/7245-the-official-halo-4-news-board/
Yes i want it back, but i rather have ODST style firefight, it was so much more addicting and compelling to go one aet further, all of the time
But with Reach's it was a drag and kinda boring
Besides Halo, its either super mario world or minecraft
SMW because i was my first game i played an those memories will never go,
And minecraft because it is such an addicting and free/open game, plus i have a train mod