A rumored CBS schedule circulating on the eve of upfronts includes on-the-bubble comedies "How I Met Your Mother," "The New Adventures of Old Christine" and "Rules of Engagement."

The Hollywood Reporter confirms that CBS is likely to maintain a Monday night comedy block that includes third seasons of "HIMYM" and "Christine," as well as a second run of mid-season comedy "Rules." Those three would carry the night along with returning hit "Two and a Half Men," a move that would mean the end of "The Class" and would also suggest that none of CBS' new comedy pilots would be on the air in the fall.

It's being reported that CBS' drama pilot pick-ups will be led by the untitled Cynthia Cidre pilot, featuring Jimmy Smits. That series could be ticketed for CBS' high profile Thursday night 10 p.m. slot after "CSI," with "Shark" possibly moving to Tuesday night at 10.

Also looking good for pick-ups are the Hugh Jackman-produced crime-musical "Viva Laughlin" (possibly for Wednesday nights at 8 p.m.), the zombie dramedy "Babylon Fields" (maybe as a Friday companion for "Ghost Whisperer") and the '70s partner-swapping dramedy "Swingtown" (maybe landing on Sunday nights.

CBS won't officially announce its schedule until the network's upfront presentation on Wednesday (May 16) morning.

Stay tuned to Zap2it for additional details.