Description said:This consumable pack contains a Level 25 boost for one Titan/Hunter/Warlock, a Subclass Boost, and Telemetries.
The nature of the Subclass Boost isn't yet known (i.e. whether it boosts all subclasses or just one, whether it fully upgrades them or not, ...).
Seems like the DLCs are still rolling out, so you might not yet see them in your regional PSN/XBL store.