That'd be a terribly stupid thing for BB to do.
That depends on how likely they feel he is to re-sign here. I think Spikes sees himself as a star and is going to want to be paid like one, and i'm guessing his next deal is going to be tough to get done ( He told his cousin, Takeo Spikes, that he wanted to be a household name after the SB, so i think he sees himself as a superstar). If I'm wrong and they think they can keep him then I would agree that he won't be going anywhere, but if they feel he is one and done and someone makes a really good offer he could be gone. I like what Spikes brings to this defense and i think this run defense is going to be exceptional as things stand now, but Belichick is pretty aggressive and i can see him making some deals this summer.
All of this is a guessing game and I'm simply guessing here, I like the player but that doesn't mean he's here for years to come. If he does stick and Jones and Hightower step right in then this is going to be a great LB corps: Jones, Spikes, Mayo Hightower, can't wait to see them lined up together.