It depends...as you are getting kittens I would imagine they would be ok with careful introductions.
My bunny, Tim has always got on with cats and when she used to live with my mum she had a large larder type cupboard to herself for the winter months with a baby gate on and the cats used to bring her presents and sleep curled up with her,
now she tries that with my cats but they really aren't sure what she wants to do! and as she is quite large, she is intimidating for them so they run away from her
my big beefy Benji in particular as she especially likes him!
so, as long as you keep an eye on both bunnies and kitties, then I think it will be fine, it has worked for me anyway.
good luck tomorrow! hope you get some sleep tonight!
Jen