Bots in offline multiplayer have been directly confirmed to me via Twitter to @candyslexia, here:
"Me: Will Ghosts feature Bots/AI in offline multiplayer? Thanks in advance!
I trust that. Also, if you watch IGN's In Depth videos on Squads mode being released daily this week, I believe that Mark Rubin states that Squads will be playable fully both online and offline. The Squads menu also has an option for local. Whether or not you'll be able to earn XP and level up, buy stuff, etc. while offline remains a mystery, but one can always hope.