does superdrive play blu ray?

If it is an actual bluray disc, then no.

The superdrive was a dvd reading and writing drive.

you can't play blu-ray discs on the apple superdrive.

you need to look at External Blu-ray Drives from OWC. they test their hardware on macs so you know that they work.

A proper Blu-Ray drive and 1) VLC media player (free), or 2) MacGo Blu-ray Player Pro (free eval with logo).

Just to add, you will also need third-party software to play Blu-ray disks.