Garry Tonon vs Zak Maxwell - I haven't seen enough of Zak Maxwell NoGi to bet on him against the "Lion Killer" Garry Tonon. Period. Garry's leg lock game is sharp. His back takes to RNC are sharp and as Kit Dale can attest, his guillotine is also sharp.
JT Torres vs Rory McDonald - it's hard to think that Rory will have much for a 2nd place black belt NoGi Mundials finisher and an ADCC medalist. I see JT hitting a heel hook in a pretty short amount of time.
Yuri Simoes vs Rafael Lovato Jr. - Yurio recently bested Keenan in the open class of the world NoGi which is a big feather in his cap. I find it hard to believe he will edge out Lovato who has shown against Kayron Gracie among others that submission only suits him and his pressure.
Kazushi Sakuraba vs Renzo Gracie
The years and allegedly the smoking and drinking have not been kind to Sakuraba. I have no idea what his training regimen is like at his dojo but he has waaaaay more violence/damage points accumulated over the years that Renzo. Kazushi fought considerably up in weight against the likes of Melvin Manhoef, Wanderlei Silva, Mirko CroCop, Kevin Randleman, Mini Nog, et cetera.
That being said, Sakuraba's off the wall and unpredictable style can be best described as "mercurial" and he has shown that he may be the Kryptonite to the Gracies as he has notched wins over 4 of the clan: Royce, Renzo, Ryan, and Royler.
I'm gonna bet with my heart and pick Kazushi by moral victory with more attacks but with no actual submission victory.