It's just personal taste, but I love seeing the bosses' names pop up, along with their subtitle. Really sets up the mood of the battle with a cutscene as well, as you see them flaunting everything they have, ready to engage you in battle, and sometimes showing off a move or two in the process that they end up using on you during the battle.
However, if you can do much more without a cutscene, I would work on implementing those features first, and then once you can put that in properly, begin to find ways to make cutscenes work with those.