Not the same topic, but here at least they put out some information.
Basically the same event, same troop rarity, so should also apply here. Keep in mind, sometimes the event is over for playing but you can still collect rewards. Many factors put in for “the devs” to actually choose when they want to release into the droppool with such vague information. Or maybe they just don’t at all - since in the Firenza case there wasn’t mentioned any information about it at all.