All these ideas that have us swapping Brown for guys roughly as good as him are a no or me. I we are going to trade Brown it has to be or an MVP level guy (like Giannis). All these other trades rely on things like "fit," and I've seen great "fits" blow up enough to know that shouldn't be the driving actor in a trade.
Let me put it a different way. Over the last 40 years only ONE team has won an NBA title without an MVP or DPOY on their team. That was your 2024 Celtics. So if you are going to blow up the core of the one team that's won WITHOUT an MVP/DPOY you better be GETTING an MVP or DPOY in return. Otherwise, you're just spinning a roulette wheel and hoping for luck.
I'd still try to do the Giannis trade WITHOUT Brown first. I'd reluctantly do it with Brown as long as Brown is most of the package. My preference would be get a good offensive center and run it back next year.