"Beyond Bond" makes me curious, too - but as already stated it´s highly unlikely that it will offer new insights instead of the usual "nothing´s decided right now"-statements.
What I meant with Craig having done all he can is this: every actor has a specific acting range. I believe Craig has tested out everything he can and wants to do with Bond. I think he already said that in an interview for SPECTRE.
What would be left? More camp like Connery embraced in DAF?
I can´t imagine that would be what Craig would like, especially not for a last outing.
And another "this time it´s personal"-arc would bore me completely.
At first, when I heard that the last line of SPECTRE was supposed to be "We have all the time in the world" I was very disappointed that that line was cut.
But now I think it was a merciful decision. Even if Craig re-introduced Bond to a new generation and was essential for rebooting the character and the ensemble, it does not mean he should re-do the whole history of the franchise.
That´s why I now believe that it would be a mistake to give him the "Garden of Death"-scenario. That one was earned by the whole built-up with Bond going against Blofeld for many years, culminating in Blofeld killing Tracy and Bond drowning in a sea of self-doubt and self-hate. Even if SPECTRE wanted us to believe that CraigBond was fighting Blofeld from the beginning it would feel just as constructed to have him kill Blofeld in the next film. The same applies to Madeleine. She is not Tracy, and Bond´s feelings for her are not even close either.
No, I don´t want CraigBond to redo Bond film history at all. It would be undeserved and unnecessary.
If Craig returns then in a stand-alone adventure that should lose the personal trappings and focus on him being a true undoubted professional.