DOn't see any logic to this. First, the Germans aren't going to need twenty years to rebuild an economy. They are going to be getting massive French and Russian reparations. They will also get favorable trade terms and won't have to spend nearly as much on their army.
Well, ... that's the kind of "logic" the Entente employed after WW 1. ... and how did this work ?
Actually not very well.
Why should it work better for a victoriuos germany ?
In a continental war the German naval tech would still be shit compared to the Royal Navy - unless you are suggesting German flutter-board tech...
I would assume at least the crews of HMS Queen Mary, HMS Indefatigable, HMS Invincible, HMS Defence, HMS Warrior, HMS Black Prince and several destroyers might have a different opinion.
However,
for the OP question :
IMO a victorious Germany
could become a threat for Britain ... but not necessarily has to.
Though by many Britain was actually seen as the "ultimate" enemy (Falkenhayn, von der Goltz, Bernhardi) prior to WW 1, there were also the leading german diplomats strongly pro-british ... and actually on a good road to an "understanding" with Britain (the "agreement" on the portuguise colonies just at the end of 1913 as only one indicator).
IF Britain stays neutral I would be well able to envisage it becomming the "peace-broker" between the CP and the franco-russian alliance.
In that role it would be well able to push its own "issues" like what happens to naval forces (i.e. the french fleet NOT surrendered to the germans, the still unbuild russian ships also "shifted" to the OE and maybe Austria or japan to be "kept" away from the nOrth Sea/british "home waters").
That way it would be well able to reduce any "threatening" potential of Germany.
Why should Germany "allow" such a role to Britain ?
The diplomats as well as the navalists knew pretty damn well, that they would be unable to fight a british blockade over some distance of time. And the military, aka war ministry, knew it too. Otherwise Rathenau would not have been received so quick so well as IOTL.
And Kaiser Bill ... would most likely be sidelined by the politicians and diplomats since at least the "Daily-Telegraph"-affair and therefore would have no influence at all on the actual negotiations (despite whatever he might blunder around).