Sigh am I really going to have to buy a fucking box of this set?
What's the source of that Show & Tell image?
I mean, if you mean "stuff that's as good as the power nine" or whatever, sure, but otherwise what, exactly? Pretty much anything I've ever particularly thought about "oh this would be cool to exist for cube purposes" has been something that's theoretically viable for a set like this.
edit: show and tell wtf
No I don't mean like Power Nine stuff I mean like
A) Another good Green 6 drop outside of Prime Time (Greenwarden isn't bad but also kind of has a small body). Also more good Black 5 drops. Pretty much every color has a spot in the mana curve that is lacking in good creatures or spells.
B) More GOOD changelings and Tribal type cards for Tribal Cube
C) Sweepers and more powerful/resilient creatures at common for Pauper Cubes
D) Ways for colors like Black to positively interact with artifacts (in ways different from other colors) and ways for Green to interact with artifacts in a way that isn't just blowing them up (and different from other colors) for Artifact theme Cubes
E) More good hybrid cards (especially one drops)
These are just some of the things I mean but its hard to fit all those things in one "cohesive" set or a set themed around one theme or concept. I'm hoping Kaladesh at least fixes some of the holes in how colors interact with artifacts.