Should Jurassic World's T-Rex reveal be kept for the film? Or shown in Trailers?

I imagine they will do something like Avengers: Age of Ultron did for Vision. Put T. rex at the very end of the last trailer. Just a couple seconds of footage for Rexy. Just enough to get us hyped.

I think they're aiming for a Huge Cinimatic Reveal with this, Kinda like Luke's father in star wars. 

To a normal movie goer, Whose not going to look at the websites, And, Might likely make up the majority seeing the movie, They won't know when or if Rex is going to show up, And then, Bam, Rexy appears and brightens everyone's day. 

Something along those lines.

We might hear a roar in one of the trailers, But, I doubt we'll see any footage, We've seen more screen time of I-rex then T-rex in the trailers so far... 

I think it would probably be best to either wait until the end of the trailer for the dramatic reveal or wait until the movie itself.

Chances are I feel that waiting until the movie itself would be a much better choice because most fans would not expect it based on the trailers, so the reveal of the t-rex can easily be one of the best moments in the movie and unspoiled by the fact it's fresh and not already been shown in the trailer.

Maybe like @Gojira2K said, or maybe show a bunch of very short clips with Rexy's roar in the background.

CHRIS PICARD - I am of the opinion that Rexy should have her grand reveal in the film! I would absolutely love a sudden appearance from her - perhaps in the middle of a battle between two other animals or a chase secene in which the I-rex is seeking out the human protagonists! That would make me exceedingly happy! :)

i want maybe quick glimpses of her in a trailer. i dont think the general audience would even care if its the same rex or not they just want to see a rex. thats just my thoughts on it