Back on X-Men:Days of Future Past?
It seems like she was put back on the movie but I personally believe that she never left and that the whole "removing Rogue from the final cut" thing was just a promotional trick.
shareLol now that you mentioned it it would have made more sense to have Rogue suddenly have a new power since she is the one that steals powers. Versus Kitty magically getting this power to send people back in time but it was never explained. One of the plot holes in an otherwise good movie, but a pretty significant one.
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