Konami's told VG247 that decisions on gamescom showings for Metal Gear Solid: Rising and Metal Gear Solid 3D: Snake Eater are yet to be made.
Yesterday, the publisher was the first to announce its line-up for the German event, with Castlevania: Lords of Shadow, Pro Evolution Soccer 2011, Def Jam Rapstar and Kinect games all confirmed.
But a Konami rep told us this morning the list was just "provisional."
"Decisions on Rising and Snake Eater 3DS will be made nearer the time," he said.
"That provisional list will continue to change on an ongoing basis."
MGS 3D, meanwhile, was announced at Nintendo's E3 press conference. It soon turned out to be a remake of Metal Gear Solid 3: Snake Eater.
gamescom takes place in Cologne between August 18-22.