It is apparently a reboot of the franchise, so it starts out in 3015, well before the clans or anything. Single player campaign, 4 player co-op, full muliplayer.
Reveal Trailer
http://pc.ign.com/dor/objects/18954/mec ... 70709.html
Posting on Kotaku.
http://kotaku.com/5309606/is-this-mechwarrior-5
also
http://www.youtube.com/watch?v=h6V2ysIq ... r_embedded
and
http://www.youtube.com/watch?v=IAE5-ikott0
pssst its a Jenner