As a concerned Flyers fan I had written to Bob McKenzie, regarding the very issue of Carter & Richards draft status:
his response via PM:
If the lockout passes June 5, in theory, Carter and Richards would go back into the next draft, whenever that it is. But like the contract issue we stared talking about, nothing is ever black and white. Carter and Richards, and unsigned players like them, will be the subject of negotiations. The NHL is not going to hang the Flyers or any team that opted not to sign draft picks out to dry...the way the NHL sees it, the Flyers did the right thing by not signing or even negotiating with Carter and Richards..the league wishes more teams woujld have done that and the league wasn't too happy on lockout eve when Anaheim signed Perry and Getzlaf, Calgary signed Phaneuf and Florida signed Perry....so technically, the answer to your question is, no one is sure what will happen...but the sense seems to be the league won't allow teams like the Flyers to lose ace prospects over lockout technicalities and there will be some mechanism introduced to give the Flyers another crack at these guys and with those guys feeling the pressure of possibly being re-drafted into a system that is going to screw entry level players...hope that makes some sense to you.
Bob