Looking at the set, I have learned that any teaser info about a set should be taken with a grain of salt as it can be incorrect/have red herrings;
- Jasmine; teaser info mentioned the adding 5 effect happened after a steel-type was knocked out the previous turn. IRL has the add 5 happen on turn 2 of the game only.
- Steelix GX; teaser info hinted its existence. IRL; doesn't exist (maybe it'll be in Full Metal Wall)
- Several cards related to the Lost Zone; I didn't know two cards constituted as several.
On another note, my immediate thought when I saw Ampharos' GX attack was; Unown Hand