[VIDEO] - Some hidden interface elements.

[malu05]

Starcraft 2 Beta - Replay Interface

[crazian]

quite interesting actually, I can't believe nobody replied.
you get a +1 in kama.

[treckin]

^ I watched, but had no idea what I was looking at

[the_ace]

^ I watched, but had no idea what I was looking at

And you are not alone 

[Linus]

a first glimpse at the campaign interface? some interesting elements in there: credits earned, mission counter, multiplayer options (coop missions?)! looking good, thanks for sharing

[Hero_Lief]

a first glimpse at the campaign interface? some interesting elements in there: credits earned, mission counter, multiplayer options (coop missions?)! looking good, thanks for sharing

There's a folder:
"C:\Program Files\StarCraft II Beta\Mods\LibertyMulti.SC2mod"
Therefor, yes, I believe there will be a Co-op Campaign.