Danke, geht mit makebox
Code:
\makebox[0pt][r]{
\visible[9]{\includegraphics[width=0.6\textwidth]{KO_1.png}}}%
\makebox[0pt][r]{
\visible[10]{\includegraphics[width=0.6\textwidth]{KO_2.png}}}%
\makebox[0pt][r]{
\visible[11]{\includegraphics[width=0.6\textwidth]{KO_3.png}}}%
\makebox[0pt][r]{
\visible[12]{\includegraphics[width=0.6\textwidth]{KO_4.png}}}%