I've been thinking about how this could be done and still be inventive and interesting. A Bondless PTS would be a bold move, and considering events that unfolded in SPECTRE, the opening to the next film could set a completely different tone and do something which hasn't been seen since Live and Let Die / The Man With The Golden Gun.
From what I gather with SPECTRE, for Bond to return to the service he needs a really good reason,
and It would be easier for them to open the next film with Madeline being killed, sending Bond into revenge mode and whilst I do think this is where Craigs Bond is heading, nothing would be able to beat a 15 minute PTS showing Blofeld escaping from MI6 custody and going after them. We could have the MI6 regulars trying and failing to catch him, setting up the premise for a Craig Bond Vs Blofeld stand off? I've really enjoyed all of Craigs opening sequences so far, and whilst I am confident that the PTS of SPECTRE can be topped (even though it was incredible), it would make sense to do something a little different the next time round. Waltz, Fiennes, Harris and Whishaw can all handle a big action scene without Mr Bond being on the scene, I'm confident of that. Plus, it gives the producers a big opportunity to see just how ruthless and clever Blofeld is without Bond there to save the moment.