Surpassing Messi in the big games? He has a looong loong way to go, the list of Messi's great performances in big games is near endless as he has had a big head start to Neymar as well (he was about 19 or 20 when he started to become amazing). Just last season he was the one who stepped up vs Bayern, set up the 2-1 in the final, scored that majestic goal in the cup final, massacred City, he basically made Neymar and Suarez his puppets on strings to finish alot of easy goals as well... they even looked ordinary compared to him in full flow.
Nah Neymar is amazing but not a chance he will surpass what messi did on a football field. Messi has everything the best and most skilful of attackers in the history of the game had, and on top of that he has the playmaking vision, passing and skills of Iniesta level. Amazing. Forget the Djoko vs Federer comparison. It's doing Messi a disservice: it's djoko vs Federer, Sampras and Agassi rolled into one.