Didn't even think about the return aspect...the Vikes have a butt load of 7th round picks if Kene is there in the 7th there's no reason not to use one of those picks.
But as someone pointed out earlier, his 40 time I think will make some team take a flyer in the 5th or 6th I bet.
Edit: so I was way off...Vikes don't have any 7th rounders.
I'm sure the Vikings will trade back a couple times so Spielman can pick up 3 or 4 7th rounders like every year.