Sealing Barrier and Reanimation Ninjutsu we both limited before they were released, possibly because I just wouldn't stop complaint about how stupid they were. Sealing was also errata'd before release, but I think that was more due to a typo. but there is a huge difference between those two cards and anything else we've seen previewed. SB and RN disrupted how the game works. SB being able to wipe out a whole strategies single handedly messes up whole themes. It also ruined the ability to search which is one the basic fundamentals that allows Naruto to run smoothly, being able to curve out ninjas. RN allowed for a "draw as many cards as you like" combo and that simply cannot be allowed.
With all of the "broken" cards we've seen, none of them do anything the screws with the game function. There just overpowered, overstated, and splashable. So, I can promise everyone that nothing previewed will be limited upon release. However, I'm sure that Chikamatsu, Hydo-Pump, and Puppet Summoning are going to be watched very closely and if something needs to be done it won't happen until set 21 the earliest.