the fact it is not on the celtic website
http://www.celticfc.net/home/fixture...firstTeam.aspx
and also as it is called a Celtic XI would lead me to think it won't include many first team Celtic players at all. coming between 2 league fixtures aswell.
However.....
the name Celtic itself will ensure a sell-out. and (with the risk of being absolutely slated!!!) i think the club is under selling the fixture. i mean if a non-season ticket holder can shell out €40 for sunderland then surely the same people (or others in their place) will pay €40 for celtic!!!
i for one wouldn't mind paying the €20 and i'm sure most other season ticket holders are the same!!