"Can you be absolutely certain of this?"

The game is going to contain CG endings, an adventure mode(RPG like mode), Konquest mode is returning, arcade mode, and of course we are probably going to get the standard modes we usually see in most fighitng games like survival, time attack, and practice. If the online mode was the main focus of MK6, then they wouldn't bother including Konqest and Adventure mode. Knowing Midway, the Krypt should be returning as well.