This nearly doubles the 34 commanders from Murders At Karlov Manor (which includes the legends in the MKM Commander decks)
Elspeth, Gideon, and Ajani are good planeswalkers to have among your creature-heavy decks, and good examples are Gideon Jura, Gideon, Ally of Zendikar, Elspeth, Knight-Errant, and Ajani, Adversary of Tyrants
More 9999 Representation Jumbo Cactuar got everyones attention with its ability to get +9999/+0 on attack when it was revealed in the early Magic: The Gathering Final Fantasy showing, but it isnt the only card thats going to represent it
Since the game is still relatively new, expect it to become more popular over time
I attempted to answer this question through an analysis of 30 different sets in MTGs history
10 Kozilek, the Great Distortion An Eldrazi Counterspell "Lord" A massively powerful Eldrazi legendary creature that has a mana value of 10, this card is not going to be winning any tempo battles