In general, - and here I want to point out that I don't "own" the thread - I tend to prefer to start a new season's thread around a week or so before the Charity Shield, which traditionally kicks off the new season, and which - this season - occurs on the 16th August, with the actual fixtures for the season commencing the following week (actually, commencing with Arsenal playing newly promoted Coventry on the evening of 21st of August).
Thus, normally, I would envisage starting a thread for the new season at the beginning of August.
However, this year, we have the distraction of the World Cup (a competition, that, for a variety of doubtless well known reasons, - not least that it is too large, too long, too corrupt, too greedy, too hot, and, far too likely to lead to catastrophic, or, at the very least, serious, injuries for key players in our club teams - I am doing my utmost to ignore with averted eyes, pinched nostrils and grinding molars).
Nevertheless, I won't deny that I am keeping a reluctant - but beady, bespectacled - eye on transfer rumours, stories, and tall tales now that the transfer window has actually opened.
Personally, to be perfectly honest, I think that it is a bit too soon to start a thread for the season of 2026/2027.
However, if others consider early August too late to start a thread, (even though that is what we have traditionally done, and that is when - around a week to a fortnight before the Charity Shield - that is the time that I have always considered the new season to be upon us), I think that a case could be made to start a fresh thread very shortly after the World Cup Final, which, if my reading is correct, is scheduled to take place on 19th July.