In just six days the UFC will put on one of its biggest shows of all time in UFC 129 from the Rogers Centre in Toronto.

The card is solid from top-to-bottom and filled with intriguing storylines. Here are the top 5 storylines I will be looking out for on Saturday night.

1. Is Jake Shields really a threat to GSP? I am a Georges St. Pierre mark. I won’t deny that. The man is my favorite fighter. Watching Jake Shields fight Martin Kampmann at UFC 121, I thought to myself “is this guy really supposed to contend with GSP?” He looked tired. He looked very poor with his striking. He basically didn’t look like a contender. But, then you look at his past and realize he dominated Dan Henderson for four out of five rounds and still got past Kampmann despite fatigue. Shields clearly does one thing well, and that is wrestling and submission. But, is Shields really any different than Jon Fitch in terms of grappling skills? GSP ran through Fitch and I think Shields’ striking ability is even worse than Fitch’s. GSP was taken down by Josh Koscheck at UFC 124, but Koscheck has a lot of explosion in his takedowns that I don’t see from Shields. Saturday night will really show if Jake Shields is as good as his record says he is.

2. Will Randy Couture go out on top? I am also a big fan of Randy Couture. I think he has been one of the best strategists in all of MMA in terms of finding holes in his opponents and exploiting them. Randy has been far better at being the underdog than being the favorite, but I wonder just how he is going to solve the Lyoto Machida puzzle. Couture can’t afraid to chase, but he also has to remain active. I think Couture can out-grapple Machida, but Machida has under rated strength and takedowns in his own right. After watching Couture fight for most of his career, I would prefer to see him end his legendary run on top. I would like him to retire knowing he could still contend in the division. I don’t want to see him with a broken nose and a glazed look in his eyes while he thanks the fans for their support like he did at UFC 57.

3. Does Jose Aldo have a weakness to exploit? I know I am being repetitive, but I love Jose Aldo too. His kicks are devastating and his hand speed is right up there with any pro boxer. He is a fighter that truly breaks his opponents down and then finishes them. He took out the leg of Urijah Faber and he slowly picked apart Manny Gamburyan in his last two title defenses. Now Aldo faces Mark Hominick. Hominick isn’t what one would consider a pound-for-pound great, but he has done very well against strikers. Hominick’s weakness has been grapplers, while Aldo is yet to be tested by a technically sound striker like Hominick. I have always been one to believe that it would be a strong wrestler that would spell the end of Aldo’s reign, but when looking at his fight history, you haven’t seen Aldo face a legit boxer with the skills that Hominick has. While I still think Aldo will win this fight, Hominick is the one guy that can land a powerful jab in Aldo’s face when the champion throws one of his signature leg kicks.

4. Where does Ben Henderson rank among lightweights? This Saturday marks the UFC debut of former WEC lightweight champion, Ben(son) Henderson. Henderson takes on dangerous grappler, Mark Bocek. The WEC got a bum wrap coming into the UFC, as some felt they weren’t good enough to compete in the octagon. However, fighters like Donald Cerrone and Shane Roller have already picked up wins over UFC vets, and Henderson owns wins over both those men. Bocek has been somewhat of a gate keeper in the division. He has beaten some quality fighters, but lost to more of the top-tier guys. A win for Henderson on Saturday would show that he can be a legit threat to the UFC lightweight crown.

5. Diaz or McDonald – Which welterweight can sneak into the top 10? – In one of the featured prelim fights on Saturday, welterweights Rory McDonald and Nate Diaz will square off. McDonald, a native of Canada, is considered one of the rising stars of the division. He took Carolos Condit to the limit before losing by TKO late in round three at UFC 115. McDonald is just 21-years-old while Diaz is 25. Nate Diaz is 2-1 since his move to welterweight but coming off a close decision loss to Dong Hyung Kim at UFC 125. Diaz is a lot like his brother, Nick, but has struggled with grapplers. If Diaz can stay off his back, he can win. If McDonald can use his wrestling to his advantage, he will win. Whichever fighter wins, they should move up into the top 10 of the UFC welterweight division and probably land a big fight in their next outing.