Today Turbine has posted a thread in the forums detailing which LI legacies will be discontinued on the launch of Helm’s Deep. As the Blue name points out, this is done to avoid people buying legacies in the Store that may change to something undesirable a few weeks later.
They also state that all to-be-discontinued legacies will be automatically converted to their new versions when the expansion launches, whether they are already applied, in your inventory or in storage.
Check it out and see what you think about losing the stated legacies!
My Champ makes use of the Ardour/Glory legacies. It will be interesting to see what they become.