I think a lot depends on this year's performance, but I'd expect Helm and Sheahan be left unprotected. I'd worry about Z, since Vegas might want some veteran leadership and may need some help to meet the cap floor. Though if he takes another step back, it may be worth the risk.
And it's $950K in cap space, which would leave $3.05 in dead space. Either way though, it'd be enough to keep one of the kids, which I think is what Kliq was getting at.