Capcom has an update for Street Fighter X Tekken due any moment now, which begins with a vast array of gems to choose from. Capcom Unity has the full list of what bonuses you’ll be able to add to your fighters.
On top of that comes the Replay Analyzer. This is loosely specified as adding additional information to replays. One can assume this would be things like the moves used, timings, and combos, or a variation on the three.
What Capcom did not specify is whether or not these items would be free. The last update contained items that were free and paid.