Storm's original Storyboards for DOFP.
Her creating a tornado to halt the advance of the sentinels however briefly before serving Pikachu realness with ha Thunderbolts
Her rising into the air after seeing her comrades getting decimated and electrocuting countless sentinels, killing one that grazed her side before getting
offscreened by one behind her.
Meanwhile Bishop gets Cyraxed by a Sentinel (at least I think that's what happened to him? One pic had the sentinel towering over him, the next had only Bishop's feet visible in the Sentinel's torso), Proudstar getting cut in half, Jubilee blown to bits, countless irrelevants who didn't make the film getting killed, Kitty getting absorbed (

), Psylocke being paid dust (I'm so glad she wasn't in DOFP from those storyboards), etc.
Magneto's storyboard scenes were badass too. Though I do prefer how he worked together with Ororo, I kinda wished the metal sphere attack he did made it in the movie. It looked so cool even from the concept art.
In conclusion. Storm and Future Magneto were done dirty.
I have no idea wth happened to Blink in the storyboards though.