Yep, no Halo 1 multiplayer confirmed. It's a Halo 1 inspired map pack of 7 maps for Reach.
Oh. Holy. Fuck.
It's like someone said, "Hey, guys. How about we take the most un-Halo like game ever and shatter everyone's memories of late night LANs and make XBC look like a godsend?"
"You mean put bloom and Armor Abilities in H:CE?"
"Yeah! And we'll replace the pistol everyone's wanted since H2 with the Reach one!"
"Hell yeah! Oh, and as a final 'fuck you very much,' we'll wrap that around the campaign remake to remind everyone of just how awesome it coulda been!"
"Oh, we're gonna make thousands of dollars off of this!"
I'm pretty sure that's exactly how the pitch went down.