I'm not to worried about that. Assuming Necas is what we think he is, he'd be protected. We'd likely lose an NHLr before losing one of those guys, and even if we did lose one of them, it's not the end of the world. Staal (NMC), Aho, TT, Lindy, Skinner, Necas, + forward acquired via UFA/trade this year for F. Slavin, Pesce, Hanifin (depending if we re-sign Faulk and make no trades) on D.
Again, a lot depends on trades, UFA signings, and how guys develop, etc...but I bet a team takes a Fleury or TVR and maybe even McGinn before one of those guys you list. If one of them blows up and becomes a really good NHLr, then we just expose someone else and protect him. We are very likely going to lose a good player this time around no matter what.