I can see a trap being on a morph creature as an unmorph condition.

Also any card besides instant could have a trap if the trap condition also allowed you to play it at instant speed. For example:

Not a Real Card
Creature - Trap
If a creature is attacking you, you may play this card as though it had flash.
You fool! You've activated my trap card! A costly mistake!
1/1

Although with trap being a sub type it seems like it could easily be confused with creature type, idk how that would work.

People think there will be delve in this set cause they rumored they were going to bring back a mechanic. But since we know kicker is in it, there is pretty much no chance of bringing back delve, so people should stop getting their hopes up for delve cards.