I doubt that. I suspect that they went over all the ways that they could call it, and settled on this as communicating what they wanted most to communicate. I really don't think that it's quite as nefarious as all that.
It has nothing to do with "nefarious." I think it's reflecting weaknesses of character in corporate culture. That's not
nefarious; at worst, it's simply that marketing-speak and corporate-speak is plastic, hollow, and talking out of both sides of its mouth. Given the ways WotC has behaved over the last two years, I don't think it's
particularly unfair to say that the upper-level, corporate types are making some double-plus ungood decisions lately.
Again, us "hardcore" D&D nerds are very attached to the messy naming conventions of the past, but the "mainstream" audience that D&D has picked up is not - and the one that they're looking for in the future is also not.
And I'm of the opinion that "5.5e" is significantly more compatible with the things your alleged "'mainstream' audience" would know and understand, while "2024 D&D" is not.
In this case, I don't even think that it's a lack of respect for the hardcore gamer market. I think that they rightly believe that we can figure it out.
That I can figure it out does not mean
what I'm figuring out is necessarily respectful.
And once they're off the "edition" bandwagon (as it's been used in the past) they can revise the game, when it's appropriate, without as much of the baggage as we've had up until now.
That will never happen. Period. It is not possible to iteratively update all possible things. Paizo literally, explicitly said that to their fanbase, when Mr. Bulmahn both eloquently and respectfully asked for PF1e players to give the new edition a chance. He was both circumspect and honest with his audience: the 3e "engine," so to speak, is simply
broken beyond repair. It cannot be fixed by slow, iterative updates. It
has to be replaced, one way or another. Drop Dead Studios' Spheres of Power/Might system is a similar recognition that the existing rules of 3e are simply broken beyond repair, and have to be replaced; they simply went in a rather different (and interesting!) direction.
I think that they were right when they tried last time to NOT call it 5e, but it didn't take that time. If they keep trying, they might pull it off. Or not. I guess we'll see.
Whereas I think they were fools to think it would work then, and they're fools to think it will work now. There will be a sixth edition, sooner or later. Nothing is eternally evergreen. Remember when Microsoft swore up and down that Windows 10 would be the eternal one? That's why they skipped over
naming it the number 9 (even though it is, internally, version 9.x), because the new version would be forever and calling the 9th version the forever version felt off to them?
And now we're only a year out from Windows 10 end-of-life, with Windows 11 being a mildly controversial but relatively accepted platform.
The dream of the evergreen edition/OS/platform/whatever is as much a pipe dream as the 3e engine's dream of having a discrete rule for everything and giving every discrete rule pride of place. It simply does not work; eventually, you realize all the places you've designed yourself into a corner that you can't fix with mere iterative updates. The caster/martial disparity, for example, cannot be fixed with a backwards-compatible rules system, unless you're okay with either massive nerfs to casters or massive power creep for martials.