Bolded is very true.
There's also the very real possibility that none of their plans are set in stone at this point. I mean who's to say that an iD developed CoD doesn't get developed? If I'm Phil, I'm keeping that on XBox. But whatever the fukk Sledgehammer, or Raven puts together? Sure, everybody can get that.
The upside is that there's a theoretical chance they just say fukk it, and use iDTech as a the CoD engine going forward. I haven't played a CoD game seriously since the original Black Ops, but that alone would get me to entertain jumping back in.