I'm almost certain I've seen the guy with the curly-horned helm somewhere before, and a couple of others are familiar too. I just can't place them...
EDIT: Heh, they're gridded for a reason! A3 is the guy I'm talking about. I feel like I've seen A4 and B9 before too.
edited 6th Aug '12 2:20:14 PM by disruptorfe404
Sorry, couldn't resist. You may now return to your regularly-scheduled art ogling.
deviantArt | TwitterI'm pretty sure they outright said that all the guild leader cards are new, including the ones representing characters who already have cards (which is a full half of them).
Also, in current standard you wouldn't even need Curiosity to go infinite with the old Niv - you could just pair him with Tandem Lookout.
I'm interested to see what the new Rakdos card will be, since he's probably the guild leader with the worst original card. The first Rakdos is actually pretty cool but he's really card to use outside of nasty Kaalia combos.
You're an ad hominem attack!Second guess then:
I'm too lazy to look it up, but I think the Golgari show up in RTR while the Izzet will have to wait until Gatecrash to show up again, so maybe Wizards figured that it's okay to spoil a card from the very next set, but spoiling one of the most anticipated Guildleaders from the set after the next one would have been too much and not worth it.

Some secret art from DOTP.
You're an ad hominem attack!