Interesting theory, though in the end I think it's probably aptly titled. As a fellow member of the B3 community I haven't seen the level of strategic planning it would take for me to give the team that much credit for forethought and planning. I could be wrong, and it would be nice if I was, but I'm just not seeing that level of sophistication from them yet. That could be from lack of funding and effort put into crafting the image, distraction by the work going on behind the scenes, or just because it doesn't exist. With no real verifiable public communication to date about the origins and composition of the team it is impossible to know.
With that said, arrangements like those hypothesized in your post could indeed be beneficial to B3. I have seen a few little hints that have been dropped here and there by mods and devs in the Discord group about Komodo and ZenCash involvement somewhow, and I agree that for B3 to play with the big boys and break out of the two to three digit satoshi range it will need some kind of external support in the form of an advisory team or partnership arrangements.
As a theory your premise would go a little way toward explaining the B3 name, though. It's always bothered me that B3 doesn't seem to mean anything, despite having been deliberately picked by someone. Bitcore, Bitsend, B3.... the third B in the series? It could just be the dev's sitting in a chat trying to come up with a new name, repeatedly trying mutiple Bitxxxx iterations until one of them said, "Hey, how about just B3. Then our next one could be B4." Or I could be completely wrong and it was planned to be that way from the beginning. Again, with no prevalence of evidence it is impossible to tell. Having a story would be a great thing for B3 and all of it's current holders.
Keep in mind too, that some people have referenced both Diamond and Europe Coin as previous projects from the development team. Without any kind of supporting evidence in the form of formal team bios or a whitepaper, in the end it all comes down to speculation. It seems to be a consensus that the developers did indeed play a role in some of those previously released coins. But what role did they play? Were they backoffice support, or lead developers? Were they represented as part of the team on the websites of those previous coins? To date we really don't know as the team is so far anonymous.
A brief dig into BitCore and BitSend will show that neither of those two previous coins have published team members or white papers either. Diamond and EuropeCoin both do, with one interesting bit from EuropeCoin's website reading, "...We also thank DMD Diamond, Bitsend, Bitcoingarden, OK-Cash, Rokos, Nextcloud Team, B1 Systems, Bitcoingarden, Bitcoin Rush, Madzebra and many more, for collaborating..."
So the precedent is there for collaboration between multiple coins. And is it merely coincidence that one the reference is B1 Systems? Probably, but again this is all just speculation.
In the very least B3 is proving to be a completely interesting project, as well as an investment that is providing a huge rate of return for me. Will the interesting nature and ROI hold?
Time will tell, I suppose. This coin will either do wonderful things for the people who have participated in the staking pools or it will go to zero. It's up to the team to determine which.