With Pentax K-01 Pentax also announced K-mount lens roadmap for 2012-2013. According to the PDF The lenses coming this year (2012) are 50mm DA standard lens and 18-200 DA high magnification zoom and rest of the lenses 24-38mm, 120-380mm, 18-85mm DA lenses will arrive on 2013.
Download the PDF to view the road map.