For anyone who's interested the next openings in this order I think are:

The link from Trafford Bar straight into Old Trafford Depot, the only way into Old Trafford Depot at the moment is from the SML (South Manchester Line)

Then hopefully Queens Road Station which replaces Woodlands Road

After that it just leaves both Rochdale and Oldham Town Centers to Oldham sometime next year

Also in other Metrolink News the go ahead has been given to build the new 2nd City Crossing of which preparation works for the movement of various public utilities has already started especially on Corporation Street