I hope it's the minutemen ending (with the minutemen defeating the institute)

I hope so too, but I think the Brotherhood ending is more likely given they seem to be Bethesda's favorite faction.

A more grey ending would be better for story then the good guys win and everybody is happy. So Brotherhood victory.

I like the Minutemen winning because it's fun imagining the good guys winning. But the Brotherhood winning better aligns with Fallout's vibes, and I think it makes the story more interesting.

Realistically it would be the BOS ending. I hope not since Deacon is awesome.

I think given the amount of detail put into the Brotherhood that it's very likely to just be them. Liberty Prime is reassembled and the Institute is gone. Synths as well. The Railroad has no reason to exist (not that they survived the onslaught).

Yes i do agree with that. also the railroad shall never exist.