It kinda makes sense.
IBM is pushing z-linux (Modified RHEL) on Mainframe. Main use is very very cheap websphere. Cobol runs on mainframe a lot right :)
Obviously they couldn't afford to do the same and buy RHEL, and CentOS is often given the hairy eyeball due to vendor support.
Also Virtzilla virtual appliances are mostly based on SuSe. Ideas could include pre-baked Cobol appliances running on SuSe. Containerised Cobol, makes sysadmins life easier I suspect.
