What can they do that would be really shocking?

I have only seen the trailers.

But i mean in the other movies they Killed Spock and Blew up the Enterprise.

Then there is that really bad movie where Rick Berman convinced Shatner to kill Kirk. Not much of a spoiler, from the beginning they were going kill kirk but the way they killed him off was stupid.

I choose to view Generations not as Canon as almost no one from the original film series was involved. It really should have been a next generation film from the outset as it succeeds as neither an old cast film or next generation film. Worst piece of crap Branan Braga made before these are the voyages.